This paper estimates net marginal Social Security tax rates, by age, for the cohorts of workers covered by Social Security in 2000, 2010, 2020 and 2030. The paper updates and extends Feldstein and Samwick's (1992) study. In contrast to their study, which found net tax rates much higher for young...

This article shows how admission and enrollment processes affect the interpretation of simple validation studies of academic performance. In a competitive market for students, optimal behavior of admissions committees and applicants drives the simple correlation between test scores and...