Examined impact of age, period, and cohort effects on United States white male suicide rates between 1933 and 1978. Employed Shazam ordinary-least-squares computer package to estimate logit coefficients for seven models. Results revealed that period effects were weaker than age and cohort effects for explaining shifts in white male suicide…

This paper examines the impact of intercohort changes in social background composition on changes in grade progression rates at selected schooling levels. It is argued that the relative and absolute effects of background composition on grade progression rates should decline over levels of schooling. Empirical support for these arguments is…

Data from nine representative U.S. population samples in the General Social Survey data file for 1974 through 1990 confirm systematic declines in verbal scores for cohorts born after World War II, with the trend beginning earlier. The importance of social change must be acknowledged in trend analysis. (SLD)