[...]Immigrants settle in one point within the vast U.S.geography. Classically, there are four great reception areas:the two coasts, Chicago, and the southern border. New YorkCity was the gateway for the great migrations of the turn ofthe twentieth century, and it remains a major destination...

In this paper we use a new data set describing households with and without twin children in China to quantify the trade-off between the quality and quantity of children using the incidence of twins that for the first time takes into account effects associated with the lower birthweight and...

In this paper we use a new data set describing households with and without twin children in China to quantify the trade-off between the quality and quantity of children using the incidence of twins that for the first time takes into account effects associated with the lower birthweight and...