这是在下的一次作业，用二阶回归验证Fama-French 3因子模型。由于时间比较紧张，所以做的还比较粗糙，希望广大朋友能多多批评指正，给予意见。同时附上SAS code方便大家了解小弟的思路。

数据来源是3因子模型作者之一的 Kenneth French 教授的data library http://mba.tuck.dartmouth.edu/pages/faculty/ken.french/data_library.html

主要参考文献有：
Fama, E. F. and J.D. MacBeth (1973) Risk, Return and Equilibrium: Empirical Tests,  Journal of Political Economy, 81, 607-636.   
Fama, E.F. and K.R. French (1992) The Cross-section of Expected Stock Returns, Journal of Finance, 47, 427-486.
Fama, E.F. and K.R. French (1993) Common Risk Factors in the Returns on Stocks and Bonds, Journal of Financial Economics, 33, 3-56