Some Facts about Dominant Firms

We are grateful to the Smith Richardson Foundation for a research grant, and to seminar participants at the NBER Summer Institute, University of Chicago, New York University, and the 2019 AEA meetings for stimulating discussions, to David Autor, Olivier Blanchard, Charles Hulten and Xavier Gabaix for their comments, and to Steve Davis and John Van Reenen for their comments, discussions, and suggestions. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.