The evidence show that: the different definitions of skewness of return is prominent for portfolios grouped by industry, firm size and book-market value.

• 论文得出的主要结论是：不论是个股分析，还是以产业别、规模、及帐面值/市值比形成投资组合，不同偏态定义投资组合偏态系数均呈显著现象。