The U.S. has a capitalist economy so the price of slaves was determine 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).