Race is not an important part of the abortion-crime argument that John Donohue and I have made in academic papers and that Dubner and I discuss in Freakonomics. It is true that, on average, crime involvement in the U.S. is higher among blacks than whites. Importantly, however, once you control for income, the likelihood of growing up in a female-headed household, having a teenage mother, and how urban the environment is, the importance of race disappears for all crimes except homicide. (The homicide gap is partly explained by crack markets). In other words, for most crimes a white person and a black person who grow up next door to each other with similar incomes and the same family structure would be predicted to have the same crime involvement. Empirically, what matters is the fact that abortions are disproportionately used on unwanted pregnancies, and disproportionately by teenage women and single women.
...Some people might think that my comments in (2) above are just ducking the race issue because it is politically correct to do so. Anyone who has read Freakonomics knows that I am not afraid to take issues of race head on. Much of the book deals with challenging issues of race (e.g. black-white test score gaps, black naming patterns, etc.). I mean it when I say that, from a purely fact-based and statistical perspective, race is not in any way central to our arguments about abortion and crime.
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