蓝色 发表于 2015-2-18 16:00
你看看伍德里奇的计量经济学导论里面的关于did的例子,13章,也是混合横截面数据
论坛上可以找到数据集的
...
那顺便问一下结果的话要怎么看
这个是我根据没协变量算的,要看哪些东西
--------------------- ------------ BASE LINE --------- ----------- FOLLOW UP --
> -------- --------------
Outcome Variable | Control | Treated | Diff(BL) | Control | Treated | D
> iff(FU) | DIFF-IN-DIFF
---------------------+---------+-----------+----------+---------+-----------+--
> --------+--------------
income | 1243.977| 1539.440 | 295.463 | 1846.773| 1557.567 | -
> 289.206
> | -584.668
Std. Error | 53.272 | 52.345 | 74.686 | 52.345 | 41.790 | 6
> 6.981
> | 100.321
t | 23.35 | 29.41 | 3.96 | 35.28 | 37.27 | -
> 4.32
> | -5.83
P>|t| | 0.000 | 0.000 | 0.000*** | 0.000 | 0.000 | 0
> .000*** | 0.000***
------------------------------------------------------------------------------------------------------
* Means and Standard Errors are estimated by linear regression
**Inference: *** p<0.01; ** p<0.05; * p<0.1