7Lev B, Penman S. Voluntary Forecast Disclosure, Nondisclosure, and Stock Prices [ J ]. Journal of Accounting Research, 1990, 28:30-35.
8Botosan C A. Disclosure Level and the Cost of Equity Capital [ J ]. The Accounting Review, 1997,72 ( 3 ) 323 - 349.
9Healy P, Palepu K. Information asymmetry corporate disclosure, and the capital markets: A review of the empirical disclosure literature [J]. Journal of Accounting and Economics, 2001, 31:405-440.
10Baek J S , Kang J K, Park K S. Corporate governance and firm value: Evidence from the Korean financial crisis [J]. Journal of FinaNCGR1 Economics , 2004,71 265 - 313.