请教各位大佬,为什么使用stata15.1做回归时会出现last estimates not found报错?以下是用到的命令:
ivreghdfe lnlabp (OSI_up=IVOSI),absorb(year countryid) first endog(OSI_up) cluster (countryid)
est store b1
ivreghdfe lnlabp $pcontrol (OSI_up=IVOSI), absorb(year countryid) first endog(OSI_up) cluster (countryid)
est store b2
ivreghdfe lnlabp (EGDI_up=IVEGDI), absorb(year countryid) first endog(EGDI_up) cluster (countryid)
est store b3
ivreghdfe lnlabp $pcontrol (EGDI_up=IVEGDI), absorb(year countryid) first endog(EGDI_up) cluster(countryid)
est store b4
outreg2 [b1 b2 b3 b4] using 面板IV回归, word replace bdec(3) sdec(3)
希望有老师同学能帮忙看看
谢谢~