"The world's two most populous countries face numerous policy challenges from rapid demographic change, including gender imbalance, population aging, and rapid urbanization. Drawing on social science expertise from China, India, and the United States, the contributors examine the social and economic challenges for policy across a range of domains, from family planning and old-age support to human capital investment, poverty alleviation, and broader issues of governance"-- "The world's two most populous countries face numerous policy challenges from rapid demographic change, which includes gender imbalance, population aging, and their interaction with rapid urbanization. Drawing on social science expertise from China, India, and the United States, the contributors examine the social and economic challenges for policies across a range of domains, from family planning and old-age support, to human capital investment, poverty alleviation, and broader issues of governance. Sections focus on "Policy Challenges and Economic Impact," "Fertility and Sex Imbalance," "Human Capital and Urbanization," and "Population Aging.""--