第二部分，考察盈余公告前的R平方和超额累计收益率的关系。
Using data around earnings announcement in Chinese market, this paper explores the topic about R square around earnings announcement.
第二部分，考察盈余公告前的R平方和超额累计收益率的关系。
Using data around earnings announcement in Chinese market, this paper explores the topic about R square around earnings announcement.
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