In the article "Cohort Effects on Non-marital Fertility," in this issue of "Social Forces," Jean Stockard employs a novel strategy for disentangling cohort, period, and age effects on the non-marital fertility ratio. In a model with fixed-effect controls for age and for time period, the author documents evidence for three cohort-specific factors…

In his book, "Freedom Summer," Doug McAdam demonstrated the long-term impact of young people's participation in a collective movement aimed at rectifying centuries of racial injustice. Coupled with James Fendrich's book, "Ideal Citizens," about black and white college-age participants in desegregating Tallahassee, Florida, the findings outline a…

In this article, the authors clarify and provide additional tests of the key elements of their age-period-cohort analysis of non-marital birth rates in this March 2009 issue of "Social Forces." Where Steve Martin, in his commentary, has suggested specific alternative specifications or interpretations of their findings, the authors have…