The main objectives of recent audit market regulations are to (1) increase audit quality, (2) decrease audit market concentration, and (3) foster competition between audit firms. However, the empirical evidence on whether such regulations fulfill these goals is limited. We construct a unique...

This paper addresses the effects of a prohibition on providing non-audit services (NAS) to audit clients. By combining a strategic auditor-client game with a circular market-matching model that has an endogenous number of auditors, we take into account the interdependence between the auditors'...