Prior research provides mixed evidence about whether sufficient audit market competition exists and whether competition … association between the probability of bidding and previously documented measures of auditor competition (i.e., market … concentration), audit quality, and audit pricing. Consistent with concerns that market concentration impedes competition, we find …

significant differences along any of these dimensions?3. Do customers of the Big4 pay higher fees compared to the competition …

competition from the local Big 6 audit firms. We find that for the Big 4, competition reduces their audit fee premiums and forces … them to recruit high-risk clients, while does not affect their audit quality. In further analyses, we find that competition … led to greater changes for the Big 4 after the CICPA's proposal in 2007 and when the local Big 6 are in leading positions …