本人急求英文文献二篇：Stock performance and intermediation changes surrounding sustained increases in disclosure，Healy1999年发表于contemporary accounting research.

另一篇：Healy，P．M．，Palepu，K．G．．Information asymmetry，corporate disclosure．and the capital market：A review of the empirical disclosure literature[J]．Journal of Accounting and Economics 2001

急用啊，谢谢！！！提供者给20金奖励。