蓝色 发表于 2018-6-13 08:09
既然有firm变量了,就没有必要产生虚拟变量了
reghdfe命令应该可以实现
你好!还想问一下吸收的自由度是什么意思?Absorbed degrees of freedom:
结果显示是这样的
Absorbed | F(7221, 105082) = 23.936 0.000 (Joint test)
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Absorbed degrees of freedom:
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Absorbed FE | Num. Coefs. = Categories - Redundant |
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code_f | 6900 6900 0 |
code_h | 322 323 1 |
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