by the law of supply and demand. For example, following bans on the import of slaves after the U.K.'s Slave Trade Act 1807 and the American 1807 Act Prohibiting Importation of Slaves, the prices for slaves increased. The markets for the products produced by slaves also affected the price of slaves (e.g. the price of slaves fell when the price of cotton fell in 1840). Anticipation of slavery's abolition also influenced prices. During the Civil War the price for slave men in New Orleans dropped from $1,381 in 1861 to $1,116 by 1862 (the city was captured by U.S. forces in the Spring of 1862). Controlling for inflation, prices of slaves rose dramatically in the six decades prior to the Civil War, reflecting demand due to commodity cotton, as well as use of slaves in shipping and manufacturing. Although the prices of slaves relative to indentured servants declined, both got more expensive. Cotton production was rising and relied on the use of slaves to yield high profits. Fogel and Engeman initially argued that if the Civil War had not happened, the slave prices would have increased even more, an average of more than fifty percent by 1890. Prices reflected the characteristics of the slave; such factors as sex, age, nature, and height were all taken into account to determine the price of a slave. Over the life-cycle, the price of enslaved women was higher than their male counterparts up to puberty age, as they would likely bear children who their masters could sell as slaves and could be used as slave laborers. Men around the age of 25 were the most valued, as they were at the highest level of productivity and still had a considerable life-span. If slaves had a history of fights or escapes, their price was lowered reflecting what planters believed was risk of repeating such behavior. Slave traders and buyers would examine a slave's back for whipping scars; a large number of injuries would be seen as evidence of laziness or rebelliousness, rather than the previous master's brutality, and would lower the slave's price. Taller male slaves were priced at a higher level, as height was viewed as a proxy for fitness and productivity. Effects on Southern economic development While slavery brought profits in the short run, discussion continues on the economic benefits of slavery in the long run. In 1995, a random anonymous survey of