2Shleifer, A. 2004, Does competition destroy ethical behavior?[J]. American Economic Review Papers and Proceedings, 414-418.
3Wang, Q., T. J. Wong, and L. Xia. 2008. State Ownership, the Institutional Environment, and Auditor Choice [J]. Journal of Accounting and Economics, 46 ( 1 ): 112-134.
4Wooldridge, J. 2009, Introductory Econometrics: An Modem Approach (4^th Edition) [M]. South-Western Co.
5Political Connections, Regional Preference of Auditor Choice and Audit Opinions:.
7Boubakri, N., J. C. Cosset, and W. Saffar. 2008. Political Connections of Newly Privatized Firms [J]. Journal of Corporate Finance, 14 (5): 654-673.
8Choi, J. H. and T. J. Wong. 2007. Auditors'Governance Functions and Legal Environments: An International Investigation [J]. Contemporary Accounting Research, 24 ( 1 ): 13-46.
9Dechow, M. P., R. G. Sloan, and A. P. Sweeney. 1995. Detecting Earnings Management [J]. The Accounting Review, 70 (2): 193-225.
10Faccio, M. 2006. Politically Connected Firms [J]. American Economic Review, 96 (1): 369-386.
