Ermisch (2009) criticized Gray, Stockard, and Stone (2006), arguing that they incorrectly tested a model positing a nonlinear relationship between the nonmarital fertility ratio and the proportion of unmarried women. I identify a different problem, which is that even if this model were to hold for a particular population, it would not in general hold for subgroups of this population; likewise, were it to hold for subgroups, it would not hold for aggregations of these subgroups.
KeywordsUnmarried Woman Teen Birth Nonmarital Birth Period Trend Nonmarital Fertility
- Wu, L.L., L.L. Bumpass, and K. Musick. 2001. “Historical and Life Course Trajectories of Nonmarital Childbearing.” Pp. 1–48 in Out of Wedlock: Causes and Consequences of Nonmarital Fertility, edited by L.L. Wu and B. Wolfe. New York: Russell Sage Foundation.Google Scholar