We introduce a new Stata command, xtpmg, for estimating nonstationary heterogeneous panels in which the number of groups and number of time-series observations are both large. Based on recent advances in the nonstationary panel literature, xtpmg provides three alternative estimators: a...

"This paper introduces a new comprehensive panel of annual state-level income inequality measures spanning the postwar period 1945-2004. For many states, the share of income held by the top decile experienced a prolonged period of stability after World War II, followed by a substantial increase...