antifake 发表于 2021-10-1 17:23 
stata路径设定一下
老师,下载了您的ado文件和mlib文件后,并且把路径设定好了,但还是出现
There exist time-invariant individual(s) (maybe only one obs): lnapatents lnfixedassets
xtdev2(): 3301 subscript invalid
thestm2(): - function returned error
<istmt>: - function returned error
有什么解决办法呢?