years later by a considerable reduction in crime, then argues that unwanted children commit more crime than wanted children and that the legalization of abortion resulted in fewer unwanted children, and thus a reduction in crime as these children reached the age at which many criminals begin committing crimes. Crime Among other papers, Levitt's work on crime includes examination of the effects of prison population, police hiring, availability of LoJack anti-theft devices and legal status of abortion on crime rates. The impact of legalized abortion on crime Revisiting a question first studied empirically in the 1960s, Donohue and Levitt argued that the legalization of abortion could account for almost half of the reduction in crime witnessed in the 1990s. This paper sparked much controversy, to which Levitt has said ". . . John Donohue and I estimate maybe that there are 5,000 or 10,000 fewer homicides because of it. But if you think that a fetus is like a person, then that’s a horrible tradeoff. So ultimately I think our study is interesting because it helps us understand why crime has gone down. But in terms of policy towards abortion, you’re really misguided if you use our study to base your opinion about what the right policy is towards abortion" In 2003, Theodore Joyce argued that legalized abortion had little impact on crime, contradicting Donohue and Levitt's results. In 2004, the authors published a response, in which they claimed Joyce's argument was flawed due to omitted-variable bias. In November 2005, Federal Reserve Bank of Boston economist Christopher Foote and his research assistant Christopher Goetz, published a paper, in which they argued that the results in Donohue and Levitt's paper were due to statistical errors made by the authors. When the corrections were made, Foote and Goetz argued that abortion actually increased violent crime instead of decreasing it. In January 2006, Donohue and Levitt published a response, in which they admitted the errors in their original paper, but also pointed out that Foote and Goetz's correction was flawed due to heavy attenuation bias. The authors argued that, after making necessary changes to fix the original errors, the corrected link between abortion and crime was now weaker but still statistically significant. In 2019, Levitt and Donohue published a new paper to review the predictions of the original 2001 paper. The authors concluded that the original predictions held up with strong effects. "We