"The Washington Post reports on an interesting new analysis by the National Campaign to Prevent Teen Pregnancy. The campaign, noting that U.S. teen birthrates fell 30% between 1991 and 2002, calculates that if those rates had instead remained constant, there would be some 406,000 additional children living below the federally defined poverty line and some 428,000 living in households with single mothers. Since 1991 was exactly 18 years after Roe v. Wade, we got to wondering if the Roe effect might have something to do with all this. The Roe effect would predict that the effect of a reduction in birthrates would be greatest in liberal states, where pregnant teenagers would be more likely to exercise their "right to privacy" and thus less likely to carry their babies to term. The campaign's numbers seem to bear this out."