Examining a drastic evolution of the audit market in China, we find that auditor mergers enhance clients' innovation. This effect is more pronounced when the acquirer in a merger is an international Big 4 auditor or when a merger leads to a greater increase in auditor size, supporting the...

This paper develops a theory of oligopoly and markups in general equilibrium. Firms compete in a network of product market rivalries that emerges endogenously out of the characteristics of the products and services they supply. My model embeds a novel, highly tractable and scalable demand system...