With world population today edging over seven billion, and with projections for it to reach nine billion by mid-century, the ideas of eighteenth-century English cleric Thomas Malthus-and his grim prediction that war, plague, and famine are the inevitable response to overpopulation--loom ever...

The Epidemiologic Transition can help us understand a fundamental puzzle about aging. The puzzle stems from two seemingly contradictory facts. The first fact is that death rates from noninfectious degenerative maladies – the so-called diseases of aging – increase as people age. It seems to...

Conventional economic theories of population growth assume that women and men have the same preferences with respect to the target number of children. For this reason, they fail to explain important patterns of demographic change, particularly in less developed regions of the world. In this...