A rapidly growing literature has shown that market concentration among domestic firms has increased in the United … measures of concentration, once adjusted for sales by foreign exporters, actually stayed constant between 1992 and 2012. We … reconcile these findings by linking part of the increase in domestic concentration to import competition. Although concentration …

gasoline market confirms that increases in concentration reduce product variety. Ignoring this product variety effect is likely …

Industry concentration and markups in the US have been rising over the last 3- 4 decades. However, the causes remain … (large) firms. Regulation driven increase in concentration is associated with lower elasticity of entry with respect to Tobin …

) segment. Two possible institutional patterns are compared. Under 'concentration' the regulated firm can enter the competitive … improves (expected) social welfare as long as goods are substitutes. Conversely, concentration performs better in case of …