"Behind China's growing economic and political power is a vast underworld of marginalized social groups. In this powerful and timely book, Wanning Sun focuses on the country's hundreds of millions of rural migrant workers, who embody China's most intractable problems of inequality. Drawing on...

Societies socialize children about many things, including sex. Socialization is costly. It uses scarce resources, such as time and effort. Parents weigh the marginal gains from socialization against its costs. Those at the lower end of the socioeconomic scale indoctrinate their daughters less...