"Economic research on the efficient allocation of resources has a long history. Increasingly, attention has turned to inequality in the distribution of personal resources and outcomes, and whether individuals or children are locked in their respective places in this distribution or whether...

Administrative tax data indicate that U.S. top income and wealth shares are substantial and increasing rapidly (Piketty and Saez 2003, Saez and Zucman 2014). A key reason for using administrative data to measure top shares is to overcome the under-representation of families at the very top that...