4Fama, E.F. Efficient capital market: A Review of Theoryand Empirical work [J] . Journal of Finance, 1970,(225):383-416.
5La Porta Rafael, Florencio Lopez-de-Silanes, AndreiShleifer, and Robert W. Vishny. Investor Protect and Corporate Governance [M] . NBER Working Paper, 2000.