This book presents a theory that integrates marriage markets and labor markets (Part 2). She uses data, primarily from Israel and the United States, to predict the effects of particular factors, such as individual resources and market size, on individual and market labor supply and marital outcomes, including bargaining power, polygamy, marriage contract, divorce and fertility. Parts 3 and 4 consider some implications of the theory for the study of sex ratio effects and compensating differentials in marriage. Part 5 provides further applications to the study of cohabitation, divorce, and polygamy. Part 6 examines how a spouse's help increases a person's human capital. The approach is interdisciplinary, combining aspects of sociology, demography, and anthropology, as well as economics