Boosting early retirement in cash-strapped districts does not hurt students' math and reading scores, according to new studies released at the American Economic Association meeting, but pension-incentive programs may cost schools some of their most effective teachers. Separate studies of teachers in California, Illinois, and North Carolina paint a…

Plunges in the stock market have taken a toll on the fortunes of the nation's pension funds for retired teachers and other public employees, with retirement systems nationwide reporting losses in the billions of dollars in recent weeks. The losses have worsened already-high unfunded obligations for plans that have promised more than $2 trillion in…