有几个入门级的概念问题不明白，请高人解释一下！

1, liquidity factor of pastor and stambangh

2, well-know cross-section patterns in stock returns

3, month-end index

4, robustness of nonzero index alphs

5, january effect

6, Russel 2000 指数在6,7月份的重组过程？

不胜感激！

[此贴子已经被作者于2009-5-25 2:57:41编辑过]