Allen, Abigail; Ramanna, Karthik; Roychowdhury, Sugata - Harvard Business School, Harvard University - 2012
We examine how the tightening of the U.S. auditing oligopoly over the last twenty-five years-from the Big 8 to the Big 6, the Big 5, and, then, the Big 4-has affected the incentives of the Big N, as manifest in their lobbying preferences on accounting standards. We find, as the oligopoly has...