The end of the American dream? Inequality and segregation in US cities

Since the 1980s the US has experienced not only a steady increase in income inequality, but also a contemporaneous rise in residential segregation by income. What is the relationship between inequality and residential segregation? How does it affect intergenerational mobility? We first document a positive correlation between inequality and segregation, both over time and across metro areas. We then develop a general equilibrium model where parents choose the neighborhood where they raise their children and invest in their children’s education. In the model, segregation and inequality amplify each other because of a local spillover that affects the return to education. We calibrate the model to a representative US metro in 1980 and use the micro estimates of neighborhood exposure effects in Chetty and Hendren (2018b) to discipline the strength of the local spillover. We first use the calibrated version of the model to explore the economy’s response to an unexpected skill premium shock. We find that segregation dynamics played a significant role in amplifying the increase in inequality and in dampening intergenerational mobility. We then use the model to explore the effects of policies designed to move poor people to better neighborhoods, like the Moving To Opportunity program. We show that scaling up MTO policies induces general equilibrium effects that limit their efficacy.