Wage inequality has risen in many countries over recent decades. At the same time, production has become increasingly concentrated in "superstar" firms. In this paper, we show that these two phenomena are linked. Theoretically, we show that shocks that increase concentration, such as an increase...

We study the distributional consequences of the Covid-19 pandemic's impacts on employment, both during the onset of the pandemic and over recent months. Using cross-sectional and matched longitudinal data from the Current Population Survey, we show that the pandemic has exacerbated pre-existing...