公司规模越大，则股票的累计超额收益率越大；
第三章对外资并购的股价反应进行实证分析。 主要采用事件分析法分别对外资并购全部样本、沪市样本及深市样本的累计超额平均收益进行实证研究。
The Event-study Methodology is adapted to make analysis on Cumulative Average Abnormal Return (CAR) of all samples, of samples in Shanghai market and of samples in Shenzhen market respectively.
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.
IPO长期业绩的早期研究以算术平均的累计调整收益率为指标，发现我国新股存在着长期超额报酬。
By equal-weighted CAR, former researches on the long-run performance of Chinese IPOs have found that IPOs in Chinese stock exchanges outperform index in the three years after going public.
IPO长期业绩的早期研究以算术平均的累计调整收益率为指标，发现我国新股存在着长期超额报酬。
By equal-weighted CAR, former researches on the long-run performance of Chinese IPOs have found that IPOs in Chinese stock exchanges outperform index in the three years after going public.
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