TY - JOUR T1 - Assessing the Significance of Cohort and Period Effects in Hierarchical Age-Period-Cohort Models: Applications to Verbal Test Scores and Voter Turnout in U.S. Presidential Elections AU - Frenk, Steven M. AU - Yang, Yang Claire AU - Land, Kenneth C. PY - 2013 SP - 221 EP - 248 JO - Social Forces VL - 92 IS - 1 SN - 0037-7732 ER -