6Aggarwal, R. K. , and A. A. Samwick. 1999. Executive Compensation, Strategic Competition, and Relative Performance E- valuation: Theory and Evidence. The Journal of Finance, 54 (6) : 1999 - 2043.
7Bain, J. S. 1951. Relation of Profit Rate to Industry Concentration: American Manufacturing 1936 - 1940. Quarterly Journal of Economics, 65 (4): 293-324.
8Chauvin, K. W. , and M. Hirschey. 1994. Goodwill, Profitability, and Market Value of the Firm. Journal of Accounting and Public Policy, 13 (2): 159 -180.
9Chen, C. , M. Kohlbeck, and T. Warfield. 2008. Timeliness of Impairmet Recognition : Evidence from the Initial Adoption of SFAS 142. Advances in Accounting, 24 (1) : 72 -81.
10Coase, R. H. 1937. The Nature of the Firm. Economica, 4 (16) : 386-495.