This paper develops a theory of oligopoly and markups in general equilibrium. Firms compete in a network of product … corporations in the USA, using publicly-available data. Using the model, I compute firm-level markups and decompose them into: 1) a …

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 …

markups during 2000- 2015. Second, the markup increase is driven by already high-markup firms (top decile of the markup … distribution) that charge increasing markups. Third, markups increased mostly among advanced economies but not in emerging markets …. Fourth, there is a non-monotonic relation between firm size and markups that is first decreasing and then increasing. Finally …