Grullon, Gustavo; Larkin, Yelena; Michaely, Roni - 2019
In the last two decades, over 75% of U.S. industries have experienced an increase in concentration levels. We find that … firms in industries with the largest increases in product market concentration have enjoyed higher profit margins and more … firms, factors that account for foreign competition, as well as to the use of alternative measures of concentration. We also …
