2Diamond and Verrec-chia.Disclosure, and the Cost of Capital[J].The Journal 1991, 46 (4) : 1325-1359.
3Liquidity, of Finance. LaPorta,R.,F. Lopez-de-Salines, A.,Shleifer and R.Vishny. Investor Protection and Corporate Governance[J]. Journal of Financial Economics, 2002 57,1147-1170.
4Charnes A., Cooper W.W., Rhodes E. (1978 Measuring the Efficiency of Decision Making Units, European Journal of Operational Research, 2(6) pp: 429 - 444.