关于Arellano and Bover 1995 paper中提出的System GMM 方法估计Dynamic Panel Data Model
我得到如下错误信息,请问哪里出了问题
_xtdpd_putlevinst(): 3301 subscript invalid
_xtdpd_mkzlev(): - function returned error
_xtdpd_dowork(): - function returned error
<istmt>: - function returned error