“…A broad discussion has emerged on the observation of increased industry concentration, markups and market power (Autor, Dorn, Katz, Patterson and Van Reenen, forthcoming;Basu, 2019;De Loecker and Eeckhout, 2018;De Loecker, Eeckhout and Unger, forthcoming;Grullon, Larkin and Michaely, 2019;Syverson, 2019). One concern is that concentration and market power may have increased as a consequence of an insufficient deterrence of anti-competitive mergers, especially in the U.S. (Baker, 2019, p. 15;Gutiérrez and Philippon, 2018;Kwoka, 2015;Philippon, 2019;Shapiro, 2018;Wollmann, 2019). Despite the prominence of this concern, empirical evidence remains limited.…”