Published online by Cambridge University Press: 04 January 2016
Over six decades ago, A. M. Carr-Sanders first identified the dramatic shift from a population regime of high mortality and high fertility before 1750 to one of low mortality and low fertility after 1900 (Carr-Sanders, 1925). Carr-Sanders had a simple explanation for these changes. Improved sanitation and advances in medicine had lowered mortality while an increase in the standard of living had triggered a temporary increase in fertility. As technological innovations reduced the economic utility of children, however, individuals responded by limiting their fertility.