Affiliations: University of Maryland and Catholic University of Rio
de Janeiro
Note: [] Department of Economics, University of Maryland, 3105 Tydings
Hall, College Park MD 20742, USA. Tel.: +1 301 405 3266; Fax: +1 301 405 3542;
E-mail: soares@econ.umd.edu
Abstract: The extremely low fertility levels observed in some countries are
the culmination of the process of social change that started with the
demographic transition a few hundred years ago. This article argues that, as in
the transition itself, the behavior of fertility today is closely related to
changes in mortality. We briefly discuss the history of human population, and
analyze the recent behavior of mortality and fertility across countries, in
order to show that these two variables have remained intimately linked
throughout the recent demographic history. We then argue that both economic and
evolutionary theories suggest that this should indeed be the case: individuals
should respond to reductions in mortality rates by reducing the optimal size of
families. Only by understanding the determinants of the current behavior of
fertility researchers and policy makers will be able to forecast its future
trend and design adequate policies to deal with the problems at hand.