The IPOs' long-run abnormal returns are sensitive to which benchmark's return is adjusted by, and to which method of weighting average is employed.
IPO长期超常收益率对使用何种参照指标的收益率来调整以及使用何种加权平均方法很敏感。
The new method USES reference portfolio formed on the base of corporation market value to calculate long-run abnormal returns, USES adjusted-t test or rank test to test abnormal returns.
改进的长期异常回报率计算方法是基于市值的参考组合法，改进的检测方法是偏度矫正的t检验法和秩和法。
There are some factors influent the long - run abnormal stock returns.
对影响长期超额收益的几个影响因素进行了分析。
And the ownership structure have effect on the long-run abnormal stock returns.
研究表明股权结构对长期超额收益有影响。
And the ownership structure have effect on the long-run abnormal stock returns.
研究表明股权结构对长期超额收益有影响。
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