Crime fell more than 30 per cent in the 19 nineties, a decline not seen since prohibition. Four factors that explain the decline and six that do not. The relationship between violent crime and the greater economy is very weak. Capital punishment didn't act as a deterrent against future crimes.
As the Supreme Court considers overturning Roe v. Wade, we look back at Steve Levitt’s controversial research on an unintended consequence of the 1973 ruling.