数据如下:
| copy starting from the next line | ------ | ---------------- |
| ||
| copy up to and including the previous | line - | ---------------- |
. bysort year month stkcd:asreg R_Rf LIVOL,fmb save(E:\IVOL\asreg回归系数.dta)
(287,183 observations deleted)
LIVOL
Fama-MacBeth (1973) Two-Step procedure Number of obs = 277879
Num. time periods = 251
F( 1, 250) = 3.93
Prob > F = 0.0484
avg. R-squared = 0.0017
Adj. R-squared = 0.0006
------------------------------------------------------------------------------
| Fama-MacBeth
R_Rf | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
LIVOL | -.020068 .0101179 -1.98 0.048 -.0399951 -.0001408
_cons | .0008898 .0003146 2.83 0.005 .0002702 .0015094
------------------------------------------------------------------------------
First stage regression results saved in E:\IVOL\asreg回归系数.dta


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