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Jack City is pleased to announce the 2014 Spring Development and College Exposure Program. The program is designed for a limited number of elite level players who want to take their game to the highest levels and market their skills to college coaches.
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SOUTH OF GLEN ROSE, A STRING OF HILLS CALLED THE SEVEN KNOBS juts out of the rolling plains. To the west, the land rises and falls in waves of rock and cedar. Blue ridges notch the horizon. This land on the edge of West Texas and at the top of the Hill Country is my second home now. Three years ago my in-laws bought some property about 75 miles southwest of Fort Worth, where my husband and I live. But it feels a thousand miles away from the city's bustling shopping malls and gridlocked freeways. We call the place "the ranch," although it pales in comparison to the huge spreads of Texas lore. But to us it's big—121 acres of rocky hills, limestone ledges, cedar, oak, yucca, prickly pear, and a few grassy pastures and meadows. It's the kind of land that writer John Graves, who lives near Glen Rose, calls "hard scrabble." Land that's not "useful" in the sense that you can make a good living off it, but land that—once you spend some time on it, observe it, and become part of it—makes living good.
Getting to know this piece of land has been like getting to know a person. Forming a bond takes time, patience, an open mind, and a sense of humor. It's a relationship that could easily and pleasantly occupy a lifetime, because land is always and never the same. It is timeless, yet it constantly remakes itself with the seasons, the weather, even the time of day. And as you get to know the plants, the animals, the rocks, and the ever-changing rhythms on a piece of land, you change too.
MY HUSBAND'S PARENTS, GRACE AND CHARLES MALONE, bought the ranch in the summer of 1996. They had been scouting land for several years after Charles, a lanky man with close-cropped white hair, blue-green eyes, and a crinkly smile, retired from his management job with a utility company. Originally they had wanted to buy land near Enchanted Rock, where they've had a deer lease for many years. But the Hill Country's inflated prices drove them farther and farther north, until they ended up in a real estate agent's office in Meridian.
Like many urbanites longing for a piece of the Texas dream, my husband, Dan Malone, who is also a writer, and I had been looking at land too—but not close to home. We coveted the wide-open spaces around Marathon and Fort Davis or in northern New Mexico. We wanted someplace rocky, rugged, untamed. So did Dan's parents. The agent knew of exactly such a place: a small ranch in Bosque County between Glen Rose and Walnut Springs. No one had lived there for ten years, and it was rough, all right.
The native grasses stood thigh-high and brambles hung like drapery from the trees. Scrub oak and sumac had spread into the gravel roads, making them barely passable in places. Years of erosion had scoured away the gravel where the roads climbed hills, creating steep, rocky drop-offs. Only high-clearance vehicles could navigate the property. The place was crawling with ticks and snakes. The corral fence was rusted and the stock tanks were drying up. The only living space was a three-bedroom mobile home at the top of a high ridge. It was infested with mice, but it had a splendid view of Flat Top Mountain and the blue ridges beyond.
The land also had a permanent resident: Oscar Newkirk McCash II. He had lived there periodically until his death in 1985, and now his tall, white marble tombstone stands like a sentinel near the gate to the property. "As the dove flies over the horizon, he's not gone, he's just out of sight," reads the inscription. McCash was only 48 when he died. Formerly a professional golfer, he was known to stand on the high ledge at the front of the trailer and knock balls into the western sky. We still find yellowed and rotting golf balls wedged between rocks or caught in a yucca's spears.
Oscar is kind of a guardian spirit, and his grave is a silent reminder that life is short. Someday he might have some company in his peaceful spot among the redbud trees.
The ranch, which is long and only about a mile wide, sprawls across vastly different types of terrain. Some places are so dry and rocky that only cactus can grow. Other parts are dark, moist, and woodsy, where red mushrooms poke through the layers of leaves. The pastures hold two stock tanks and are planted with coastal bermuda grass; in the summer bluebells and antelope-horn milkweed pop up through the blades. A nearby rancher leases the pastures for his heifers, and we dream of grazing goats and burros there someday.
Because the property isn't far from home, Dan and I can regularly load up our two big mutts, Pablo and Hadley, our Scottish terrier, Ernest, and our orange tabby, Rufus, and spend long weekends or even a week there. Grace and Charles and their Yorkshire terrier, Brandi, split their time between the ranch and a house in Cedar Hill, south of Dallas. They are building a permanent home on the high ridge, and Dan and I have moved the mobile home to another hill. I never thought I'd like spending so much time in a mobile home, but with front and back decks, new carpeting, new paint, and no mice, it is quite comfortable.
Already our bond with the land is strong. Some of that connection comes from sweat and hard work, but much of it comes from within. The ranch fulfills emotional needs in a way the city never could—a yearning to belong to a place, to feel optimism about the future, to enjoy simple pleasures, to find some meaning in each day. When Charles painted a square piece of sheet metal green, sprayed a black M in the center, and hung it on the ranch's front gate, a feeling of pride and responsibility welled up inside us

subset: commoncrawl


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Past Tour Dates for Betty Soo
Betty Soo Tour Dates 2014
date city state venue 06/06/2014 Austin TX Cactus Cafe 05/16/2014 Houston TX McGonigel's Mucky Duck 03/01/2014 Austin TX Austin Acoustical Cafe 02/28/2014 La Grange TX The Bugle Boy 02/01/2014 Dallas TX Dallas Museum of Art 01/30/2014 Houston TX McGonigel's Mucky Duck Betty Soo Tour Dates 2013
date city state venue 12/08/2013 Dallas TX The Kessler Theater 11/29/2013 Fort Worth TX Central Market 10/17/2013 Wimberley TX Susanna's Kitchen 09/09/2013 Austin TX Continental Club 06/08/2013 Austin TX Cactus Cafe 05/19/2013 Austin TX House Concert 04/13/2013 Spring TX Millbend Coffeehouse 04/11/2013 Fort Worth TX Central Market 03/02/2013 Houston TX Anderson Fair Betty Soo Tour Dates 2012
date city state venue 12/22/2012 New Braunfels TX Gruene Hall 12/14/2012 Dallas TX AT&T Performing Arts Center 11/17/2012 Victoria BC Victoria Event Centre 10/27/2012 Austin TX House Concert 10/26/2012 Fort Worth TX Central Market 09/29/2012 Austin TX Hummingbird Concerts 09/28/2012 Belton TX Hughes Recital Hall


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discussion's about this years Lochaber Marathon
I am tapering, though maybe not as much as I should be. 13 miles tomorrow, 8 tomorrow week, then a rest week(end) and then just a pootled parkrun on 14th to take advantage of being in Scotland.
Hello all - it is suddenly seemin a lot closer. Last LSR (20-21 miles) for me later today. Still feeling the strains from last weekend; physio has blamed it on my glutes rather than the hamstrings - a bit stiff but we will see how it goes today. My taper starts tomorrow - slightly complicated by being on holiday in Mull for a week from next Saturday - need to find a 13 mile reasonably flat and safe route on single track roads with lots of holiday traffic - any suggestions welcome!
Did 20 miles in 3 hours early yesterday, well before the mercury hit the dizzy heights of 21 degrees. Apart from a couple of nasty blisters I seem to have come through it unscathed. Despite my pitiful training mileage, getting to the start line now looks like a real possibility. Not sure whether to start the taper now or put in another 20 miler next weekend. The sensible thing to do would to start winding back now, but we'll see!Glad everyone else seems to be getting in good shape. Some excellent half marathon times being posted.
Here's hoping the weather is a bit more seasonal in 3 weeks time!
There certainly has been a problem with hot weather once in the last 5 years, but I think we'll be back to usual dreich scottish conditions by then.
Little bit of faster running for me this morning- just to prove that the taper has started! No mor eslow plodding wah-hey! ( except the 16miles next weekend!)
Decided that 16 miles today would be silly, did 13miles, with middle bit at planned race pace - I'm having trouble finding a steady pace, and kept going up to more like half mara pace.....then I was knackered, never mind. Realy must rest a bit now, legs still feel rough.
I think just a few short runs at race pace or faster , nothing longer than an hour from now.
Just looked at my stats, compared to PB at this distance, on Fetch anaylsis thingy- unless I do less than 1 miles in the next 2 weeks, my mileage will be higher than previously , so perhaps my trainig hasn't been as awful as I thought!
Positive thoughts, everyone.....don't let the taper wibbles set in!
I'm also hoping that the reason it felt so bad yesterday was the accumualtion of fatigue from trainig- the taper WILL fix that .....................I hope!
Starting to think about my race kit for the day- weather looks like it will be cooler by then, but I've never needed anthing more substantial than running vest, 3/4 leggings, arm warmers, and a hat to actually run in.
Hope we're not going to end up running through a snow drift!
current forcast for fort william next weekend
2degress, feels like -4, 19% chance precip, 20 mph northerly wind!
A lovely Scottish Spring day. Shorts and vest it is then...
I think it might be reasonably sheltered from a northerly, as the road goes along the north side of the Loch, and there are hills north of that.
I might re-think what I was going to wear, though- add gloves, ear warmers, maybe switch to a top with sleeves!


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Is an overhaul of Japan's nearly ¥130 trillion public pension reserve fund just a way to prop up stock prices? Think again, Prime Minister Shinzo Abe's administration says.
Many investors have postulated that one of the main reasons behind the Abe administration's call for the Government Pension Investment Fund to shed some of its heavy weighting to domestic bonds is to buoy Japan's stock market. Yet the government made a point of saying why exactly the GPIF will shift its portfolio in a revised set of policy goals released Tuesday.
"Investment reform will take place exclusively for the benefit of those covered by the pension system," the document reads. As a result ultimately, such an investment strategy would help promote "a virtuous economic cycle."
The document also says the GPIF would reshuffle its portfolio "as quickly as possible" and aim for "more flexible investment management."
News that the GPIF will likely increase its stock holdings has lifted Japanese share prices in recent weeks. The fund has a 60% target weighting to domestic bonds, which critics say is too high now that Mr. Abe's administration is trying to spur price rises. Inflation erodes the value of a bond's fixed coupon payments and principal, not a good thing when you're trying to secure money to pay retirees.
Some lawmakers have said a greater GPIF presence in the market could be a way to turn around Japan stocks – once spurned by foreign investors. The Nikkei Stock Average is still down 60% from its 1989 peak, even after surging 57% in 2013.
When compared with foreign stock markets, the Nikkei has also lagged in its post 2008-financial-crisis recovery. The S&P 500 is up 167% from a low in 2009, whereas the Nikkei is still up only 103% over the same period.
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Superconductors can radically reduce the size of engines and increase engine efficiency and enable many new technologies. For the last few decades what has prevented this is the high cost of superconductors, the cost of lowering the temperature to a level where superconductors can operate and production limitations.
This new superconductor should greatly expand the uses for superconductors and the continued progress with better superconducting materials suggest that room temperature superconductors could be developed in the near future.
Synthesis of these materials was by the solid state reaction method. Stoichiometric amounts of the below precursors were mixed, pelletized and sintered for 11 hours at 890C. The pellet was then annealed for 10 hours at 500C in flowing O2.
The 200K material is believed to have a B212/1212C intergrowth structure, where B=11 and C=copper chain. This structure is shown below left and has the chemical formula Sn6Ba4Ca2Cu10Oy. The general formula for this new family of superconductors is SnxBa4Ca2Cu(x+4)Oy. Within this new family, unit cells with 3 to 6 atoms of tin (x) have been found to superconduct, with 6 atoms of tin producing a new record high Tc near 201K.
Four resistance tests were averaged and four magnetization tests were averaged, producing a mean resistive Tc of 200.8 Kelvin and a magnetic Tc of 202.4 Kelvin.
The discovery is by a lone inventor and has not been peer reviewed yet.
Joe Eck the inventor/scientist and his website are well cited by universities and other sources.
Previous superconducting discoveries have all had patents applications made. The inventor seems to be in correspondence and having his work followed by scientists at Los Alamos and other respected institutions.
Reviewing the Many Superconducting Developments in 2008
The formula for the 195K superconductor is (Sn1.0Pb0.5In0.5)Ba4Tm6Cu8O22+. Its 1256/1212 structure is shown.
A new method of production was developed. This new method of synthesis, layers of 12x(x+1) and 1212 precursors are alternated in a "layer cake" arrangement before sintering. Each layer was initially pressed at 200 psi. Then, once all the layers were set, the entire pellet was pressed at 70,000 psi and sintered in the UPRIGHT position. When sintered in the "sideways" position, very little of the desired phase forms. This suggests gravity facilitates migration of the heavy thulium atoms. This technique results in the desired phase forming along interference boundaries..
Ten times more 185K superconducting material was made and detectable amounts of 195K material.
The 195K material is being patented. But the new method of synthesis is being released into the public domain without patent protection. It may be used freely without limitations. When combined with the Tao Electrostatic Separation Technique, this method should be able to produce a near homogenous 195K bulk superconductor
NOTE: this was a highly systematic process to modify the makeup of the material to find a higher criticial temperature structure.
The number of families of superconducting material is providing more points of data for creating unified theories for all superconductors. Successful unified theories would be able to guide the experimentalists even better on optimal doping strategies and changes to the structures to tune the various properties of the superconductors. This could allow rapid progress to the creation of room temperature superconductors and material for moving higher energy density and optimizing many other useful properties.
There is also a low energy model and electron pockets hole model
This year has seen excellent experimental progress being made to room temperature (300K) superconductors as well as theoretical progress. There has also been the whole new class of higher temperature iron based superconductors.
Getting up to dry ice temperatures will lower the cost of using the superconductors because the cooling problems will be greatly simplified. It gets us closer to the goals of room temperature superconductors and some of the applications could be possible with dry ice. Even the superconductors that need a lot more cooling are being used for more efficient engines and generators that are three times smaller than conventional. There has also been a commercial pilot of superconducting cable for electric utility distribution. Superconductors can also make better magnets for nuclear fusion reactors.
It appears that dry ice cooling temperatures are two to seven times cheaper than liquid nitrogen temperatures.
BBC News talked about that anticipated but delayed vision from the hoped for results from the 1987 "warmer" superconducting breakthroughs.
Levitating high-speed trains, super-efficient power generators and ultra-powerful supercomputers would become commonplace thanks to a new breed of materials known as high temperature superconductors (HTSC).
Those difficult to manipulate superconductors have been on track to make smaller and more efficient motors with commercial impact in 2010 South Korea was making significant advances with 1300hp superconducting generators.
They were also being tested in 36.5 MW motors for navy ships.
Electric car motors would shrink to be one third the size for the same power by using superconducting wire. Similar to the previously mentioned improvement for the large superconducting motors of navy ships. It is more difficult to make a cost efficient superconducting small motor.
If room temperature superconductors were cheap to make they could replace batteries and also the need for a car engine by storing the power to run the car. Currently this is cost prohibitive. Wikipedia has an article on superconducting magnetic energy storage
Here was a more recent list of predictions of what "warm" superconductors that we had before the most recent two announcements could provide. 100Tbps routers, faster communications, faster computers, better sensors and more. Room temperature versions would make all of these things cheaper, more widespread and more powerful.
If the new room temperature superconductors have or can be made to have a very high current density relative to their weight, then there is the possibility of a ground launched magnetic sail or high performance magnetic sails for space propulsion.
31 page pdf of the 1999 Zubrin study for Nasa on magnetic sails
Getting up to 100 billion to 1 trillion or more amperes per cubic meter is the current density for high performing magnetic sails.
D.G. Andrews and R.M. Zubrin, "Magnetic Sails and Interstellar Travel." Journal of the British Interplanetary Society, 1990. The first paper published, concerned primarily with the cost savings to other propulsion systems from the use of the magsail as an interstellar brake.
R.M. Zubrin and D.G. Andrews, "Magnetic Sails and Interplanetary Travel." Journal of Spacecraft and Rockets, April 1991. The technical description and very thorough analysis of the magsail for interplanetary travel. Excellent.
R.M. Zubrin, "The Magnetic Sail." Analog Science Fiction & Fact, May 1992. A version of the above paper edited for a non-technical audience. Useful for general concepts, inadequate for a full understanding.
Uses of cheaper versions of current superconductors.
Electrostatic Separation Technique for Superconductors is described here. This technique will work to separate superconductors from metallic as well as non-metallic materials.
In the electrostatic separation technique, a vertical capacitor cell with dimensions 18mm X 15mm X 15mm was fashioned from a U-shaped teflon spacer. 2 brass plates were attached to the open sides of the spacer to create a cavity and provide electrodes for the capacitor. The cavity was filled with liquid nitrogen and particles of roughly 25-38um size were placed in the pool. High voltage (1100 dcv/mm) was applied to the two metal electrodes for at least two minutes. The electric field was then reduced (to 333 dcv/mm) for one minute. After collecting the respective particles, they were found to be essentially pure BSCCO and pure Sb.


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dc.contributor.author | Mogalakwe, M. | |
dc.contributor.author | Mufune, P. | |
dc.contributor.author | Molutsi, P. | |
dc.date.accessioned | 2011-09-15T10:18:35Z | |
dc.date.available | 2011-09-15T10:18:35Z | |
dc.date.issued | 1998 | |
dc.identifier.citation | Mogalakwe, M. et. al (1998) The impact of state legislation on the organisation of trade unions: the case of the Botswana Federation of Trade Unions (BFTU) in Botswana, Development Southern Africa, Vol. 15, No. 4, pp. 537-554 | en_US |
dc.identifier.uri | http://hdl.handle.net/10311/886 | |
dc.description.abstract | Labour legislation is the unique device governments use to lay down standards and conventions in the workplace and to control industrial relations. Using focused interviews with unionists, government officials, employers and other relevant parties, this field study investigated the way in which labour legislation in Botswana affects the organisation of the country's federation of unions. The findings indicate that the BFTU's organisation is affected by the Trade Union and Employers Organisation Act.In particular, the restrictions in this Act separate policy and administration in the BFTU and this has had negative implications for the union's effectiveness. The fact that its policymaking body is part-time negatively affects coordination, communication and cooperation processes in the BFTU. According to the Act, public sector workers are not technically employees and therefore cannot belong to unions. This gives the impression that the state is not particularly convinced about the benefits of unionisation. This may create a difficult environment in which the BFTU and other unions must operate. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Taylor and Francis (Routledge), www.taylorandfrancisgroup.com/ | en_US |
dc.subject | Trade unions Botswana | en_US |
dc.title | The impact of state legislation on the organisation of trade unions: the case of the Botswana Federation of Trade Unions (BFTU) in Botswana | en_US |
dc.type | Published Article | en_US |
dc.link | http://pdfserve.informaworld.com/627786_731385705_790966257.pdf | en_US |


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Digital curation is the selection, preservation, maintenance, collection and archiving of digital assets. Digital curation is the process of establishing and developing long term repositories of digital assets for current and future reference by researchers, scientists, and historians, and scholars generally. (Excerpt from Wikipedia article: Digital curation)
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Title | Article summary | Date |
Live Blogging @ IWMW 2009 |
Kirsty McGill provides a live blogger perspective on the three-day Institutional Web Managers Workshop, held by UKOLN at the University of Essex, Colchester, in July 2009. |
October 2009, issue61, event report |


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Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter.
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OCR for page 55
Discrimination in the
Criminal Justice System
A Critical Appraisal
of the Literature
Steven Klepper, Daniel Nagin,
and Luke-lon Tierney
Discrimination in the criminal justice system is an issue
of substantial social concern. The discretionary
of the principal actors--the police, prosecutors,
judges--are considerable and allow ample latitude
unfair treatment of persons of a specific race or
background. A large empirical literature has emerged
concerning the extent of discrimination in the criminal
justice process.
These studies examine separately or in
combination the effect of race or social class on the
likelihood of arrest, prosecution, bail, conviction, and
the type and severity of sentence. The findings of the
studies are by no means consistent. Some find evidence
of discrimination while others do not.
In this paper we argue that there are major flaws in
the literature we have reviewed that limit its usefulness
for making inferences about the extent of discrimination
in the criminal justice system. We also suggest research
strategies to remedy these weaknesses. Our critique and
suggestions are prompted by a review of 10 papers, chosen
by the panel on the basis of their salience in the
literature and their quality, as well as a number of
additional papers.
While our paper is based on a review of a small sample
of studies, we are confident that our conclusions apply
generally to the larger literature. First, to some
degree our criticisms apply to all of the studies
OCR for page 55
reviewed, which makes it unlikely that they do not apply
to the larger literature. Second, implementation of
several of our recommendations requires the use of
statistical methods that have only recently been
developed and are not yet widely employed. Third,
implementation of these statistical procedures requires
the use of modeling approaches that have not been widely
adopted in the criminological and sociological literature.
Our review suggests three major remediable flaws in
the literature:
(1) The Absence of Formal Models of Processing
Decisions in the Criminal Justice System Case dispo-
sition--whether it is dismissal, acquittal, conviction,
or sentencing--is the consequence of the interplay of a
diverse set of actors, each with individual objectives.
Even if a disposition does not directly involve one of
these actors, expectations about their actions if they
were to become involved may affect decisions. For
example, a prosecutor may choose to dismiss a case based
on the expectation that a judge will do the same if the
case is prosecuted. Similarly, a defendant may choose to
accept a plea bargain on the basis of an expectation of
the likelihood of conviction at a jury trial and the
sentence if convicted.
In order to model decisions at each stage of the
criminal justice system, a theory of the important
decision criteria of each of the major actors and their
interaction is required. Without such a theory,
estimating equations are likely to be misspecified, which
in turn is likely to result in serious biases in the
estimated effects of included variables and an inability
to discern the effects of more subtle influences. The
latter is particularly pertinent to measuring the effects
of social class and race because their influence, while
possibly of sufficient magnitude to warrant concern, are
probably less important in affecting disposition than
clearly legally relevant variables like case quality and
the seriousness of the crime. Perhaps even more
important is that without a well-structured theory,
inferences about the role of social status and other
factors at each processing stage may be extremely
misleading. For example, an observation that social
status affects sentences in negotiated pleas may not
reflect prosecutorial bias but rather the biases of
judges or juries. We regard this point as crucial
because implementation of policies to rectify any
undesirable effects of race and social status on
OCR for page 55
disposition requires a knowledge of the stage(s) of the
criminal justice system at which these factors are
(2) Sample Selection Biases Resulting from Screening
and Processing Decisions The criminal justice system has
been likened to a leaky sieve. ~
In Washington, D.C., for
example, of every 100 felony arrests only 13 result in
felony convictions. Of the remaining 87, 16 result in
misdemeanor convictions. Nearly all the rest are
rejected for further processing at an initial screening
or subsequently dismissed by a prosecutor, judge, or
grand jury. Of those convicted only about 32 percent are
incarcerated (Forst et al., 1977). Thus, cases that
reach the sentencing stage are a very select group that
typically represent only a small proportion of the
population of "similar" cases (e.g., same arrest charges)
that originally entered the system. Moreover, even those
cases entering the system via an arrest are themselves a
selected sample of crimes. In most major metropolitan
areas, clearance rates (crimes solved by the police,
typically by the arrest of a suspect) hover around 20
percent. This low clearance rate principally reflects
the absence of any suspect but is also affected by the
exercise of arrest discretion by the police.
By the very nature of the system, analyses of the
determinants of sentence must be executed on a selected
sample of cases, namely those that have resulted in
conviction. Since the selection process is by no means
random. it mav induce serious biases in parameter
estimates of included variables.
Such biases may, for
example, result in an inappropriate conclusion that
racial considerations influence sentencing decisions when
in fact they do not.
Recently developed econometric
procedures can be employed in some circumstances to cope
with the biases induced by sample selection.
(3) Use of Arbitrary Scales to Measure Qualitatively
Different Dispositions
dismissal or acquittal.
sentences include fines, probation, and prison or some
combination of these at a specified amount or duration.
Many of the papers we reviewed employ arbitrary rules for
measuring these qualitatively different outcomes. The
index that results serves as the basis (e.g., the
dependent variable in a regression model)
of the correlates of "severity of outcome." While the
scales that are applied are not patently unreasonable,
serious questions remain about the degree to which
A case may be disposed by
For convictions, possible
for an analysis
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findings are simply an artifact of an artificial scale.
We are particularly concerned that use of these arbitrary
scales may conceal the importance of subtle influences
that could be measured if such scales were not used.
While the approaches we suggest for coping with these
problems will improve the quality of statistical
inference about discrimination, we are under no illusion
that their adoption will yield definitive results. The
combination of our relative ignorance about the factors
determining case-processing decisions and the problems of
using nonexperimental data ensure that definitive
findings will not be forthcoming soon. In response to
the inherent limitation of studies based on nonex-
perimental data, we have included a section on the use of
experiments to measure discrimination in the criminal
justice system. This section discusses the limitation of
experiments, approaches for minimizing these limitations,
and strategies for combining experimental and nonexperi-
mental data.
The paper is organized as follows. We begin with a
review of statistical issues that arise in the analysis
of binary data. Next we discuss the so-called sample
selection phenomenon and elaborate on its effects. We
then develop a model of the criminal justice system.
Next we review selected studies in the context of the
sample selection phenomenon and the model developed. We
then discuss alternative models of the sentencing
decision that do not require the use of arbitrary
severity indices. Next we discuss experimental
approaches to measuring discrimination. We conclude with
a summary of our major points.
Many decisions in the criminal justice system involve
binary outcomes, such as the prosecutor's choice to
dismiss or prosecute a case or the jury's decision to
find the defendant guilty or innocent. It is common
practice to define a binary y such that y = 1 if one
outcome (say, a verdict of guilty) occurs and y = 0
otherwise. In a number of the studies we reviewed, the
relationship between the likelihood of the event y = 1
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and a vector of variables x is examined by regressing y
on x. The purpose of this section is to point out some
hazards of this approach and to describe an alternative
approach that we employ in subsequent sections.
We begin with a discussion of the classical regression
model. The model assumes that a random variable y can be
related to a vector of variables x by
Yi = Xi ~ + hi
i = 1, . . . , N , (1)
where column vectors are underlined, ~ is the K x 1
vector of regressors for the ith observation in a sample
of size N. ~ is a K x 1 vector of unknown parameters, and
si is the disturbance or error associated with the ith
observation. The errors c1, . . . ~ eN are assumed to be
independent with zero mean and common variance o2. The
regressors ~ , . . . , ~ are often assumed to be
nonstochastic, although they may also be assumed to be
random variables that are independent of the errors
' e ~ ~ ~ � N.
These assumptions imply that the conditional
distribution of y given x is such that
E(yil_i) = Xi $_
V(yilxi) = o2 .
Equations (2) and (3) state that for each xi, the
distribution Of Yi given xi is such that E(yilxi) is
linear in xi and V(yilxi) is constant for all i. Under
these assumptions, it is well known that ordinary least
squares provide consistent and unbiased estimates of the
coefficient vector $.
The assumptions of the classical regression model are
appropriate in cases in which the dependent variable has
a large, approximately continuous range of possible
values. However, in the case of a binary variable, many
~ . . . . . . _ .
~ IS a
binary variable that takes on only the values of zero and
one. Let p(x) equal the probability that y = 1 given x.
Then it is easy to demonstrate that
or tne assumptions are no longer tenable. suppose Y
E(yilXi) = P(Xi)
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Var(yil xi) = p(xi) [1 - p(Xi)] -
Equation (4) indicates that the conditional expectation
of y given x is equal to the conditional probability that
y equals one given x. If the range of the observed x
values is very small, then it may be appropriate to
approximate p(x) by x'0. In this case, ordinary least
squares will consistently estimate $.
(5) indicates that V(yilxi) is not the same for se' i.
This implies that ordinary least-squares estimates are
inefficient and the standard hypothesis tests are
invalid. These problems can be corrected by using
standard techniques for adjusting for heteroskedas-
ticity. If, however, the range of the x values is large,
then the fact that p(~ can take on only values between
zero and one (it is a probability) implies that it cannot
be approximated by a linear function of x.1 In this
case ordinary least-squares estimates are consistent, and
the inconsistency may be very severe.
To illustrate this point, consider the linear
probability model:
However, equation
_'D if O ~ x'D < 1_ _ _ _
p(x) = 0 if x'0 ~ 0
1 if x'D > 1 . (6)
Figure 2-1 displays the form of p(x) for the case in
which x is a scalar. Also shown is a set of hypothetical
observations that might arise in which a number of the
x-values fall outside the range where p(~ is linearly
increasing. The dashed line depicts the model that would
be estimated by ordinary least squares.
By choosing
enough observations with very high or very low x-values,
the slope of the model estimated by ordinary least
squares can be made arbitrarily small. This difficulty
can be avoided by fitting the linear probability model
specified in equation (6) using nonlinear least squares.
However, this introduces severe computational problems.
Therefore, it is useful to consider alternative models.
Most models for binary variables that have been
proposed in the statistical literature can be written as
p(x) = F(x't) ,
where F is a continuous, nondecreasing function with
F(-~) = 0 and F (be) = 1, i.e., F is a continuous
distribution function. The choice of a particular form
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- ~
The Linear Probability Model
----OLS Regression Line
� Observed Data Point
FIGURE 2-1 The Bias in Ordinary Least-Squares Estimation
for F is usually somewhat arbitrary and should be taken
in the same spirit as the assumptions of linearity and
normally distributed errors in simple regression models.
The most popular models of this form are the linear
probability model discussed above, which is obtained by
F(z) = z
if z < 0
if 0 < z < 1
if z > 1 ,
the PROBIT model, where F(z) is set equal to the
cumulative standard normal distribution function, and the
LOGIT model, with F(z) = eZ/(l + eZ).
Models of this form can be motivated in a number of
ways. We employ one such motivation repeatedly in the
following sections. Let y* represent a latent,
unobserved variable that can vary between plus and minus
infinity. The latent variable y* is assumed to be
related to x by the standard regression function
Yi* = Xi '0 + Pi ~
where ci is an unobserved disturbance with mean zero and
constant variance o2. The dichotomous variable y is then
assumed to be related to y* by
Yi = 1 if Yi* > b
0 if Yi* < b ,
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where b is an unknown cutoff level.
this implies
P(Yi = Taxi)
P(Yi = 0lxi)
Using equation (8),
P(_i'6 + ~ i > b)
p (� i > b - _i'6) ~
1 - p(� i > b - Xi 0)
If F(.) is the~distribution function of c, then this can
be alternatively stated as
P (Yi = 1' Xi) _ p (Xi) = F (b - Xi ~ )
P(Yi = 0Ixi) _ 1 - P(_i) = 1 - F(b - Xi B)
. (lob)
Note that equation (10) is in essentially the same form
as equation (7).
The unknown parameters of the model are the vector of
coefficients 6, the variance o2, and the cutoff level b.
It can be shown that neither o2 nor b can be estimated
because they are not uniquely defined.2 But the
coefficient vector ~ can be estimated directly from a
sample of observations on the binary variable y and x.
One widely employed estimation procedure is called
maximum likelihood estimation. It has a number of
desirable features for cases in which a relatively large
sample of observations is available on (y, x). For the
LOGIT and PROBIT models, specially designed computer
algorithms for calculating the maximum likelihood
estimator and its estimated standard errors in large
samples are available. For a more complete discussion of
estimation and other issues in binary variable models,
see Goldberger (1964:248-251) and Cox (1970).
To get a better idea of how this approach can be used
to model events that occur in the criminal justice
system, consider the example of a jury determining
whether a defendant is guiltye The jury hears the
evidence, which can be summarized in terms of various
attributes of the case, such as the number of
eyewitnesses, whether a weapon belonging to the defendant
was recovered, etc. Suppose that the investigator can
observe some of these attributes, perhaps from court
records, and can quantify them in terms of a numerical
vector x - (xl, x2, � , xK)'. Other attributes of
the case, such as the credibility of the witnesses, are
not recorded in court records and hence cannot be
observed by the investigator. Let their composite
influence be represented by s. The jury then might be
viewed as computing an index y* = x'D + ~ measuring the
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strength of the case against the defendant. The
observable factors xl, x2, . . . , xK are given weights
of 01, 62, . . . ~ ~K, respectively relative to the
weight assigned to s. The jury then determines whether to
convict the defendant on the strength of the evidence,
measured by y*, by comparing y* to a level b and
Declaring the defendant guilty if y* > b and not guilty
otherwise. The critical level b is presumed to be
determined according to the interpretation of the notion
"beyond a reasonable doubt."
The statistical problem is to determine the factors
the jury takes into account and their relative
importance. Among other matters, the investigator might
be interested in testing whether juries discriminate
against certain types of defendants, in which case the
personal characteristics of the defendant might be
included in x. The problem facing the investigator is
that he or she observes the vector of case attributes x
and whether the defendant is convicted, but not y* and
c. To estimate ~ using this information, the jury's
decision process can be modeled as
Ii = 1 if Yi* = Xi ~ + hi _ b
0 if Yi* = Xi ~ + ~ ~ b ~
where I is a binary variable that equals one for
conviction and zero otherwise. The vector of
coefficients ~ are the parameters of interest. This is
in precisely the same form as equations (8) and (9).
Hence the weights 61, 62, . . . ~ OK can be estimated
directly using the approach discussed above. A similar
approach is taken in the subsequent sections to model
other decisions in the criminal justice system that
involve binary outcomes.
~ . ~ [~
. . .
Selection Bias
The criminal justice process can be thought of as a
series of stages, each involving a different set of
actors. The first stage involves the detection of a
crime, followed by communication of the crime to the
police, arrest, prosecution, trial, and sentencing. The
literature indicates that the various actors involved at
each stage make calculated decisions about the types of
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crimes that are processed to the next stage. For
example, studies of the prosecutor indicate that less
serious crimes and those with weak evidence are more
likely to be dismissed following arrest. These same two
characteristics appear to influence the decision by the
police to make an arrest, while the quality of the
evidence certainly affects the likelihood that a jury
will render a verdict of guilty and pass a case on to the
sentencing stage. Other factors, such as the prior
record and socioeconomic status of the criminal, also
appear to play a role in some of the stages.
As a result of deliberate actions of the various
actors in the system, the crimes that reach each
successive stage in the system after the first are not
representative of the broader population of crimes.
Samples used to study the various stages in the system
are thus selected according to certain characteristics.
This does not itself pose a problem for the
investigator. A potential problem does arise, however,
from the combination of the sample selection process and
the fact that some of the features of a case that affect
the way it is processed cannot be observed by the
investigator. For example, prosecutors and judges may
possess a great deal of qualitative evidence about a case
that the investigator cannot observe from court records.
In other instances, the investigator may not observe
other, less qualitative types of evidence, such as
whether the criminal used a weapon. The combination of
screening and incomplete measurement implies that
criminals reaching the later processing stages are not
representative of the unobservable (to the investigator)
as well as the observable features of the population of
cases entering the system. This introduces the
possibility of sample selection bias.
The type of biases that may arise can be illustrated
best with an example. Consider the sentencing of
convicted criminals. Suppose that the various actors in
the system discriminate against individuals with low
socioeconomic status (SES) as well as individuals
committing more serious crimes. (The latter form of
"discrimination" may be socially desirable.) Then
consider high-SES individuals who are convicted of a
crime. Holding the effect of factors that are observable
to the investigator constant, such individuals would
ordinarily have a lower probability of reaching the
sentencing stage (given the hypothetical assumption of
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discrimination). If they have been convicted, then,
holding constant the effect of the factors observable to
the investigator, they must be unrepresentative
concerning the factors unobservable to the investigator
that contribute to reaching the sentencing stage. For
example, they may have exhibited a greater degree of
premeditation than low-SES individuals who have been
convicted, or a greater fraction of them may have used a
weapon than low-SES convicted criminals. (The degree of
premeditation and weapon use are assumed to be
unobservable to the investigator.)
This may cause problems when the investigator tries to
determine the factors influencing the sentencing
decision. Suppose that SES does not affect sentencing,
but seriousness of the crime does. By the above
argument, if discrimination exists against low-SES
individuals at the earlier stages of the criminal justice
system, then, ceteris paribus, high-SES convicted
criminals will be above average on both the observable
and unobservable dimensions of the seriousness of a
crime. Judges are assumed to observe both sets of
factors and to take both into account when deciding on a
sentence. The investigator, however, can observe only
one set of dimensions. Even after taking account of the
observable differences in the cases of highand low-SES
criminals, the investigator will still find that high-SES
criminals receive longer sentences. This will suggest
that judges discriminate against high-SES individuals,
even though there is no discrimination at the sentencing
stage and there is discrimination against low-SES
individuals at the stages preceding sentencing.
More generally, this example points out that if there
does exist discrimination against low-SES individuals at
the sentencing stage, then the biases induced by sample
selection might mask the true extent of the
discrimination. It is conceivable that the biases might
even create the illusion of reverse discrimination at the
sentencing stage, when in reality discrimination against
low-SES individuals is present at all stages. The biases
induced by sample selection are of course more general
than the example--they might occur at any stage in the
system following the first screening stage, and they
might distort the effect of any of the observable
features of a crime. This suggests that it is essential
to try to account for the effects of sample selection in
order to make reliable inferences about the various
processing stages in the criminal justice system.
OCR for page 55
to act out the hearing. This could be done once and
recorded on video tape or it could be done repeatedly
with each judge in the experiment acting as the presiding
The drawback of this approach is its high cost, both
in time and money. Case files are less realistic but
also easier and less expensive to use. It is not clear
how much is actually lost if a well-designed case file is
substituted for an actual or reenacted hearing.
Preliminary experiments might be used to determine a
reasonable format for presenting cases. Certain control
questions designed to determine whether the information
presented is adequate might be composed. For example,
judges might be asked whether they felt that any
additional information that might be available in court
would change their decision. Several different questions
might be asked, such as "What decision would you make
based on the information you have?" and "What decision
would you most likely make if you encountered this case
in court?"
If the judges use the available information to
construct subjective probability distributions over the
possible values of the unavailable information, then
these two questions address different aspects of these
distributions. The answer to the second question would
be the sentence associated with the mode of the
subjective distribution, whereas, under quadratic loss,
the first question would be answered with the sentence
corresponding to the mean of that distribution. Thus in
the presence of incomplete information, the answers to
these questions might differ, whereas they would be the
same if the necessary information was provided.
Different answers can therefore be taken as an indication
that the case information was not adequate (Manski and
Nagin, 1981, discuss this point in the context of
consumer choice surveys).
If an experiment is based on a subset of judges, then
it is imperative that the subset be representative. In
many sentencing experiments the participating judges are
volunteers. Even when all judges in a particular
jurisdiction participate in an experiment, nonresponse
rates are often so high that participation in the
experiment has to be viewed as essentially voluntary. As
a result, judges who do participate are likely to be more
conscious of existing problems and more interested in
reducing them than the average judge. An experiment
based on such a sample will tend to underestimate the
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seriousness of these problems. To protect against this
kind of bias, an experimental format, such as personal
interviews, can be used to minimize the nonresponse rate.
Even if the cases presented to the judges are real
cases presented in their natural setting, the judges will
always be aware of the fact they are participating in an
experiment. Their decisions clearly will not have the
impact of decisions handed down in court, for a prison
sentence handed down in an experiment does not send
anyone to prison. As a result, judges may treat a
decision in an experiment less seriously than a decision
in court. To alleviate this problem, judges must be
provided with an incentive to treat experiments with the
same importance they would treat an actual case. For
example, decisions made by a panel of judges on an actual
case might be provided to the presiding judge before a
decision is rendered. This is done in the sentencing
council experiments discussed in Diamond and zeisel
The most serious problem in sentencing experiments is
the evaluative nature of the experiments themselves.
Most experiments are designed to collect data on a
specific problem, e.g., the extent of discrimination and
Disparity in sentencing. This can rarely be concealed
from the judges participating in the experiment. As a
result, individual judges may try to ensure that they do
not deviate too far from perceived norms, thus leading to
an underestimate of the severity of the problem under
This individual sensitivity to evaluation can be
reduced by keeping responses anonymous. However, the
fact that results of the experiments may be used by
critics of the judiciary to support changes in the system
may cause judges who want to maintain the status quo to
adjust their decisions to reduce the apparent severity of
the problems under study. This bias is likely to be
particularly severe if the experiment is an unusual event
rather than a routine matter. It may be reduced if
making decisions on experimental cases is required of all
jduges in a jurisdiction on a regular basis.
The reaction to the experimenter's intent may also be
reduced if the experimenter can deceive the judges as to
the purpose of the experiment. This requires a
convincing cover story and a carefully designed
questionnaire that does not reveal the true purpose of
the experiment. Deceptions of this type are often used
for similar reasons in psychological experiments,
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although they raise serious ethical questions (see
Rosenthal and Rosnow, 1969). Furthermore, in view of the
narrow range of issues considered in most sentencing
studies, it is not clear whether these deceptions will
succeed. Thus it is unlikely that these biases can be
eliminated completely.
If it is not possible to prevent the judges from
adjusting their answers in an experiment, then it might
be possible to control for these adjustments by modeling
the process that generates them. Suppose, for example,
that experimental cases have been constructed from actual
cases by varying, say, the race of the defendant. In
this case, using equations (33) and (35), for each k
there is one pair i,j (the race of the actual defendant
and the judge who heard the case) for which the actual
decision is available. For the other i,j pairs only
experimental observations exist. Thus for each k,
Yijk = ~ + Vi + JO + Ck + Sick
for one pair id, and
Yijk = H* + Vi* + ad* ~ Ok* + �ijk
otherwise. These observations might be combined by
assuming that the overall mean sentence and the case
effects are the same for the experimental and
nonexperimental observations, i.e., p* = ~ and Ck* = Ok,
but that the effects of the discriminatory factor and the
disparities in the experimental observations have been
scaled down by the factors a, 8, and y, respectively.
Thus vi = avi, dj* = D6j, and eijk* = Y�ijk, where
a, 8, y > 0 (and probably less than one). The observed
court cases can then be used to calibrate the experimental
This point illustrates one way in which experiments can be
used in conjunction with nonexperimental data. Experiments
can be used to validate results obtained from nonexperimental
data or to provide alternative estimates with different
biases. In particular, as noted above, observed court cases
provide only an upper bound on the disparity within judges,
whereas experiments (before adjustment) tend to underestimate
this anantitv. Simultaneous use of experiments and courtroom
~ . . . _
observations can thus provide bounds on the severity ot
Experiments might also be used to deal with the selection
problem. Wilkins et al. (1973) and others use experiments to
OCR for page 55
analyze the details of the judges' decision processes,
including the variables they use in making decisions and the
order in which these variables are considered. Similar
experiments could be performed with other members of the
criminal justice system, such as the prosecutor. The results
might provide information about the factors that contribute
to the correlation between the unobserved variables in the
different stages of the selection process. This information
might help the investigator assess the magnitude of the
correlation and determine which, if any, additional variables
should be measured.
Experiments can be used to address a number of questions
that cannot be answered using observational data. For
example, judges might be asked to choose both a determinate
sentence and a minimum and a maximum sentence for
hypothetical cases. Their responses could be used to
evaluate the implications of laws on determinate sentencing.
Experiments can also provide information about cases that
occur too infrequently in court for observational data to
provide accurate results. Many studies, for example, have
found it impossible to investigate the relationship between
sentence and the defendant's sex because the number of women
in their samples was negligible.
So far our discussion has been concerned with experiments
for analyzing the behavior of judges. Other aspects of the
criminal justice system can also be analyzed with
experiments. For example, experiments could be designed to
determine whether prosecutors act in a discriminatory fashion
when deciding whether to prosecute a case. Experiments might
also be useful aids for constructing models of the plea
� ~
Bargaining process.
In addition to providing data for analysis, experiments
may also have a beneficial side effect, especially if they
are conducted on a regular basis. Many judges and other
members of the criminal justice system are sensitive to the
problems of disparity and discrimination in sentencing. The
results of regular controlled experiments might reduce
disparity and discrimination by helping judges understand and
calibrate their own decisions.
The major drawback to experiments is their cost. The
problems associated with experimental data may seem easier to
solve than the problems of observational data, but the cost
of running experiments, both in money and in the demands they
place on the judge's time, make it difficult to obtain
samples that are large enough to provide very precise
estimates of the parameters of interest. Thus it is unlikely
that observational data, in which sample sizes are typically
OCR for page 55
large, can be dispensed with entirely. The simultaneous use
of both approaches, in which the particular advantages of
each approach can be exploited, is an avenue that deserves
more attention in future work.
We argued that the studies of discrimination in case
disposition generally suffer from at least one of three major
shortcomings: (1) the absence of formal models of the
processing decisions in the criminal justice system, (2)
failure to consider the sample selection biases that result
from the many screening decisions in the criminal justice
system, and (3) the use of arbitrary scales for scaling
qualitatively different dispositions.
Most of our discussion of these problems focused on ways
in which they can lead to underestimates of the severity of
discrimination in the criminal justice system. Despite these
problems, some studies do find evidence of discrimination.
However, this should not be interpreted as suggesting that
discrimination is actually present. There are many other
problems, such as the omission of important variables
possibly correlated with race or social status, that can lead
to overestimates of the severity of discrimination. Some of
these points are discussed in detail in Garber et al. (in
this volume).
Each of the shortcomings enumerated above is, in
principle, remediable. However, correcting them will require
a formidable research agenda. Carefully specified models
reflecting the essential motivations of the principal actors
in the criminal justice system and the dynamics of their
interplay are required. Furthermore, the data sets to be
considered will have to be carefully chosen and perhaps
combined with the results of designed experiments in order to
mitigate the effects of sample selection. Novel and complex
statistical techniques will be needed for the analysis.
While these obstacles are formidable, we see no alternative
to addressing these problems. If they continue to be
neglected, then the extent of discrimination in the criminal
justice system will continue to be mired in uncertainties so
great that no generally accepted resolution will ever be
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Proposition: If x is uniformly distributed then t1 = t2,
t1 - E[xlx + w1 ~ -(I + 6)] - E(xlx + w1 ~ -a) (A-1)
t2 - E[xlx + w1 > -(a + 0), x + w2 ~ -(a + 0) ]
- E(xlx + w1 ~ -a, x + w2 > -a) (A-2)
Proof: Equations (A-1) and (A-2) can be rewritten as
t1 = E[xlx > -(a + 8) - wl) - E(xlx > -a - wl) (A-3)
t2 = E[xlx > -(a + B) - wl, x > - (a + B) - w2)
- E(xlx > -a - wl, x > -a - w2) . (A-4)
Let fl(r) ~ P(-W1 = r) and f2(r) _ p[max(-wl,-w2) = r].
Note that given w1 and w2, one of the two conditioning
arguments in each of the two terms on the righthand side
of equation (A-4) is redundant. Using this and fl(~) and
f2(~) to integrate out w1 and w2, equations (A-3) and
(A-4) can be written as
�1 = S{E[XIX > -(a + D) + P] - E(xlx > -a + f)}fl(~)df
t2 = S{E[XIX > -(a + $) + P] - E(xlx > -a + P)}f2(~)dT,
which implies
t1 ~ t2 = S{E[XIX > -(a + 6) + P]
- E(xlx > -a + f)}[fl(~) ~ f2(~)]d~
Using the fact that if x is uniformly distributed,
E(xlx > \) = (a + A)/2, where a is the maximum value x
can assume, equation (A-5) implies
t1 ~ �2 = 1/2J-~[fl(r) - f2(~)]df = 0 ,
where the second equality follows from the fact that
fl(~) and f2(r) are proper probability density
functions. This result generalizes trivially if x is
multiplied by any scalar in the conditioning arguments in
equations (A-1) and (A-2).
This establishes the assertion in the text that if x
is uniformly distributed and Y1 = Y2 = Y3 then 82 ~ 63
OCR for page 55
1. This is because a linear function of
constrained to lie between zero and one.
is not
2. In the jargon of statistics, neither a2 nor b is
identified (assuming, in the case of b, that x contains a
constant regressor). This can be seen as follows.
Multiply a2, b, and ~ by the same positive constant.
Then P(Yi = lax) is unchanged. Hence it is not possible
to estimate the levels of both ~ and a2. Instead, a2 is
typically set equal to one for estimation purposes and ~
is effectively estimated relative to the arbitrary value
assigned to a2. As for b, suppose that x contains a
constant regressor. Then if 01, the constant term in the
regression, and b are changed by the same amount, b -
xi'8, hence F(b - xi'D) remains unchanged. As a result,
for estimation purposes, b is typically set equal to zero
and the cutoff level is subsumed into the constant.
3. The coefficient of ui in this expression follows from
the fact that if E(ylz) is linear in z then y can be
expressed as
y = nz + [Cov(y,z)/Var(z)](z - nz) + v ,
where nz _ E(z), V(v) = oy(1 _ p2), p = [Cov(y,z)/ay~z],
V(z) - c2z, and V(y) _ o2y .
4. The selection that occurs as a result of the
imprisonment decision is somewhat different from other
selection mechanisms we have discussed. The imprisonment
decision is made by the judge who also determines the
length of the sentence. The formal distinction between
the imprisonment decision and the determination of the
sentence length is thus somewhat artificial.
Nevertheless, if the two decisions are viewed as
separable, which is implicit in studies that investigate
the sentence length for individuals that have been sent
to prison, then the appropriate mathematical formulation
of this process is the same as the one that would be
appropriate if the decisions were made by separate
individuals. As a result, the same model applies.
5. We do not distinguish between jury and bench trials.
The model could easily be generalized to include this
option, but such a generalization would only complicate
OCR for page 55
the discussion without further illuminating the points we
wish to make.
6. Another relevant factor is time spent in pretrial
detention. Conditions in jail are frequently worse than
in prison. If the defendant opts for a trial, the time
spent in pretrial detention is likely to be increased.
7. The decision to charge includes the choice of whether
to prosecute and the choice of which charges to file
given prosecution. We consider only the former choice.
8. Dismissal can occur before or after charges have been
filed. We treat dismissals that occur after charges have
been filed as decisions not to charge. The term
dismissal is restricted to instances in which the
prosecutor declines to prosecute after an arrest has been
9. The factors giving rise to selection bias involve the
stages preceding the sentence length decision and thus
are not related to the true extent of discrimination in
the sentence length decision of each judge.
10. However, we argue below that this finding may
actually be the result of discrimination at the
prosecution andVor conviction stage rather than in
11. The purpose of introducing this model is merely to
fix ideas. The discussion could equally well be based on
a more complicated AN OVA model, one in which the effects
of the discriminatory factors are viewed as nested within
judges, a binary model, a binary plus a conditional
continuous model, or an ordered multiple response model.
Administrative Office of the United States Courts
1973 Federal Offenders in United States District
Court, 1971. Washington, D.C.: Administrative
Office of U.S. Courts.
Altman, E. I., R. A. Avery, R. A. Eisenbeis, and J. F.
Sinkey, Jr.
1981 Application of Classification Techniques in
Business, Banking, and Finance. Greenwich,
Conn.: JAI Press.
OCR for page 55
Chiricos, T. G., and G. P. Waldo
1975 Socioeconomic status and criminal sentencing:
an empirical assessment of a conflict
proposition. American Sociological Review
Clarke, S. H., and G. G. Koch
1976 The influence of income and other factors on
whether criminal defendants go to prison. Law &
Society Review 11(1):59-92.
Cook, P. J., and D. S. Nagin
1979 Does the Weapon Matter? An Evaluation of a
Weapon-Emphasis Policy in the Prosecution of
Violent Offenders. Washington, D.C.: Institute
for Law and Social Research.
Cox, D. R.
1970 Analysis of Binary Data.
London: Methuen & Co.
Diamond, S. S., and H. Zeisel
1975 Sentencing councils: a study of sentence
disparity and its reduction. University of
Chicago Law Review 43:109-149.
Farrell, R. A., and V. L. Swigert
1978 Prior offense record as a self-fulfilling
prophecy. Law and Society 12tSpring):437-453.
Forst, B., and K. Brosi
1977 A theoretical and empirical analysis of the
prosecutor. Journal of Legal Studies
Forst, B., J. Lucianovic, and S. J. Cox
1977 What Happens After Arrest? A Court Perspective
of Police Operations in the District of
Columbia. Washington, D.C.: Institute for Law
and Social Research.
Frase, R. S.
1978 The decision to prosecute federal criminal
charges: a quantitative study of prosecutorial
discretion. University of Chicago Law Review
Gibson, J. L.
1978 Race as a determinant of criminal sentences: a
methodological critique and a case study. Law
and Society Review 12(Spring):455-478.
Goldberger, A. S.
1964 Econometric Theory.
New York: John Wiley &
1980 Abnormal Selection Bias. Unpublished
manuscript. University of Wisconsin.
OCR for page 55
Greenwood, P., et al.
1973 Prosecution of Adult Felony Defendants in Los
Angeles County: A Policy Perspective. Santa
Monica, Calif.: Rand Corporation.
Heckman, J. J.
Hagan, J.
1975 Parameters of criminal prosecution: an
application of path analysis to a problem of
criminal justice. Journal of Criminal Law &
Criminology 65(4):536-544.
1979 Sample selection bias as a specification error.
Econometrica 47(1):153-161.
LaFree, G. D.
1980 The effect of sexual stratification by race on
official reactions to rape. American
Sociological Review 45(October):842-854.
Landes, W. M.
1971 An economic analysis of the courts. Journal of
Law and Economics 14:61-106.
Lizotte, A. J.
1977 Extra-legal factors in Chicago's criminal
courts: testing the conflict model of crimina 1
justice. Social Problems 25(5):564-580.
Manski, C. F., and D. Se Nagin
1981 Behavioral Intentions and Revealed Preference.
Unpublished manuscript. Carnegie-Mellon
Un iversity.
Olsen, R.
1980 A least squares correction for selectivity
bias Econometrica 48:1815-1820.
Partridge, A., and W. G. Eldridge
1974 The second circuit sentencing study: a repor t
to the judges of the second circuit. Federal
Judicial Center No. 74-4.
Reiss, A. J.
1975 Public prosecutors and criminal prosecution in
the United States of America. Juridical
Rosenthal, R., and R. L. Rosnow, eds.
1969 Artifacts in Behavioral Research. New York:
Academic Press.
Swige' , V. L., and R. A. Farrell
1977 Normal homicides and the law. American
Sociological Review 42(February):16-32.
Tiffany, L. P., Y. Avichai, and G. W. Peters
1975 A statistical analysis of sentencing in federal
courts: defendants convicted after trial, 1967
1968. The Journal of Legal Studies 4:397-417.
OCR for page 55
Wilkins, L. J., D. U. Gottfredson, J. O. Robinson, and
C. A. Sadowsky
1973 Information Selection and Use in Parole
Decision-Making. NCCD Research Center, National
Council on Crime and Delinquency, Davis, Calif.
Wolfgang, M. E., and M. Reidel
1973 Race, judicial discretion, and the death
penalty. The Annals of the American Academy of
Political and Social Science 407(May):119-133.
Zimring, F. E., J. Eigen, and S. OtMalley
1976 Punishing homicide in Philadelphia:
perspectives on the death penalty. University
of Chicago Law Review 43(2):227-252.


text:
Evangelista Cyborg vs. Paul Daley possible for Strikeforce in November
I agree a great fight:thumb02:
I hope it puts an end to Daley's delusion that if he touches someones chin the fight is over. |
Yeah, cause Cyborg has a good chin. I think it's test for Cyborg and Daley as well. Winner definately has title contentions!:thumbsup:
Evangelista's got a chin and he likes to brawl... this is definatly gonna be fire works...
I got Daley by TKO in round two.. |
Already a good fight for Paul Daley, can't wait. Paul Daley by TKO.
hopefully it looks like Cyborg vs Manhoef!
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