楼主最近需进行面板分析,使用的数据需同时控制i,j,已经确认同时控制country i,domicile j下数据均为75个:
但是做面板时仍会报错,报错语句为:
Error in pdim.default(index[[1]], index[[2]]) : duplicate couples (id-time)In addition: Warning messages:1: In pdata.frame(data, index) : duplicate couples (id-time) in resulting pdata.frame to find out which, use e.g. table(index(your_pdataframe), useNA = "ifany")2: In is.pbalanced.default(index[[1]], index[[2]]) : duplicate couples (id-time)还请各位大神帮我看看,提点意见建议,感谢!
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