2Gietzman M B, Trombetta M . Disclosure interactions: accounting policy choice and voluntary disclosure effects on the cost of capital [ J ]. Accounting and Business Research, 2003,33(3) : 187 -205.
3Lang, M H, Lundholm R J. Cross-sectional determinants of analysts' ratings of corporate disclosures [ J ]. Journal of Accounting Research, 1993,31 (2) : 246 - 271.