长期事件 meaning in Chinese

long term event

We survey external methodology papers about long - run event studies , and focus on analyzing and introducing " the choices of expected return models ( or return benchmark ) " , " the approaches to measure abnoumal performance " , and " the empirical power and specification of test statistics "
摘要本文对国外长期事件研究方法论文献进行了全面的梳理，并着重介绍和分析了期望收益模型（或收益基准）选择、异常收益度量，以及检验统计量的设定与检验力等。