"To test the idea, the scholars examined the correlation between state abortion rates from 1973-1976 and state crime rates from 1985-1997, ostensibly when the children, had they not been aborted, have reached the prime crime-committing age group of 18-24. After factoring out such influences as income, racial composition, unemployment and incarcerations, Donohue and Levitt found a statistically significant correlation between high abortion rates and lower crime rates. For example, Donohue noted, the 10 states with the lowest incidence of abortions saw their murder rate rise 16.9 percent between 1985-1997, while the 10 with the highest incidence of abortions saw their murder rate drop 31.5 percent."