The Economic Policy Institute's report "Enriching Children, Enriching the Nation" got lots of ink in papers around the country. Every story I read expressed no skepticism about the state-by-state number crunching, which reported enormous returns from public spending on preschool. Andrew Leonard in a piece on Salon acknowledged up front that he supports public spending to provide high quality preschool to disadvantaged three-to-five year olds. But he bristles a bit at analysis by University of Chicago Nobel Prize-winning economist James Heckman that spending on pre-kindergarten will create a stronger, more talented, more effective work force. Leonard says public spending on preschool is a good thing, whether it produces economic gains or not." Investing in young kids would be good for them, even if it didn't make society more productive. And that should be reason enough to do it."

Heckman's 98-page report is here. Unlike the EPI analysis, Heckman argues that providing preschool to the disadvantaged produces the greatest returns and poses no tradeoff. But investing public money on programs for higher income kids makes less sense.