Have the idle rich replaced the working rich at the top of the U.S. income distribution? Using tax data linking 11 million firms to their owners, this paper finds that entrepreneurs who actively manage their firms are key for top income inequality. Most top income is non-wage income, a primary...

This paper studies the coevolution of the fall in the US corporate sector labor share and the rise of business activity in tax-preferred, pass-through form. Reallocating activity to the form it would have taken prior to the Tax Reform Act of 1986 accounts for one third of the decline in the...

This paper uses administrative tax data to estimate top wealth in the United States. We assemble new data that links people to their sources of capital income and develop new methods to estimate the degree of return heterogeneity within asset classes. Disaggregated fixed income data reveal that...