金融事件研究中的数量分析方法简析【内容摘要】:金融事件研究法是在市场理性的前提假定下,将金融资产的实际收益分解为正常收益和非正常收益,从而把事件发生对资产所产生的影响转化为资产的非正常收益在时间序列上的运动情况来加以研究
而在处理非正常收益上,针对不同的研究目的和约束情况,可以分别使用参数估计和非参数估计两大类方法中的各种模型,来构建统计量以对非正常收益的变化特征做假设检验,进而判断事件发生对资产收益的影响
【 Abstract 】 : Under the hypothesis of rationality in the financial marketplace an financial event study divides the actual return of financial assets into two parts, the normal one and the abnormal one, and then turns to study the time-series changes of assets’ abnormal return to know the effects of the happening of an event on assets
Under different objects of studying and constraints, two main methods, the parametric estimate and the nonparametric estimate with their own sub-models are suitable to analyze the abnormal return
The general procedure is to make kinds of statistics to te