4Armstrong C.,D.F. Lareker, C. Su. Stock options and chief executive officer compensation [ R ]. Stall ford University, Working paper,2007.
5Aboody,D. , Kasznik, R. , Williams, M.Purchase Versus Pooling in Stock-for-Stock Acquisitions: Why do Firms Care [ J ]. Journal of Accounting & Economics, 2010(29) :261-286.
6Batllala, C.T. 1996. Determinants of managerial stock ownership:the case of CEOs [J~. The Financial Review, 1996 (31) : 127-147.