原函数是FXFBt=ai0+aik+βi1KSRt+βi2JINIt+βi3SHBt+βi4WJPt+βi5EDUt+βi6JRWJt+εit,
aik是个体固定效应,我用FXFB,KSR,JINI,SHB,WJP做内生变量,用EDU,JRWJ,year,rejion做外生变量,写的程序是
xi:xtabond2 fxfb l.fxfb ksr jini shb wjp edu jrwj,gmm(fxfb ksr jini shb wjp,log(1 .)) iv(year region jrwj edu) robust noconstant smal
为什么总显示
unknown egen function max()
stata(): 3598 Stata returned error
xtabond2_mata(): - function returned error
<istmt>: - function returned error
刚学,菜鸟一个,求助各位大神啦