This article discusses the evolution of income inequality in the United States. We focus mainly on the evolution of inequality since the 1960s because more data are available for this period than for earlier periods. We document that income inequality rose in the United States during the period...

We compile a database of American city population densities from 1940 to 2000, which was not previously available publicly in an electronic format. Using this data set, we investigate trends in urban density patterns. Nonparametric estimates of urban density distributions suggest a distinct,...