中文摘要：

利用是否发生财务重述来衡量强制信息披露质量,利用构建的自愿信息披露指数来衡量自愿信息披露质量,考察了信息披露质量与权益资本成本的关系。发现,信息披露质量高的公司具有较低权益资本成本。另外,检验强制信息披露质量和自愿信息披露质量对权益资本成本的联合影响,要优于检验它们各自对权益资本成本的影响。

英文摘要：

We measure mandatory information disclosure quality by financial report restatement,and measure voluntary information disclosure quality by voluntary information disclosure index.We investigate the relationship of information disclosure quality and the cost of equity.We find that corporations with higher information disclosure quality have lower cost of equity.And testing the joint influence of mandatory and voluntary information disclosure quality on the cost of equity is better than testing their influences separately.