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Andrew Goodman-Bacon, former trainee, wins 2015 Nevins Prize for best dissertation in economic history

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Joe Grengs: Policy & planning for transportation equity

David Lam photo

Modeling Seasonality in Fecundability, Conceptions, and Births

Publication Abstract

Lam, David, Jeffrey A. Miron, and Ann Riley. 1994. "Modeling Seasonality in Fecundability, Conceptions, and Births." Demography, 31(2): 321-46.

This paper develops a model of seasonal fluctuations in fecundability, conceptions, and births. We begin with a model of individual fecundability that combines behavioral and biological components, with particular attention to the roles of coital frequen cy, sperm concentration, fetal loss, and contraception. The individual-level model is then expanded into a model of seasonal fluctuations in births at the population level, which accounts explicitly for seasonal fluctuations in the size of the susceptibl e population. We illustrate the use of the model by analyzing proposed explanations of birth seasonality that rely on extreme summer heat.

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