“…Using the National Establishment Time Series (NETS) dataset, Rossi-Hansberg et al (2018) find that, although product market concentration has increased at the national level, it has indeed declined at the local level, with an overall fewer number of national firms competing in more local markets. Karabarbounis and Neiman (2018) andBridgman (2019), who use Compustat and National Accounts data, respectively, find only a modest increase in firm markups in the last few decades.…”