Hi, Check these links: http://r.789695.n4.nabble.com/quot-duplicate-couples-time-id-quot-Problem-td4636316.html
http://stackoverflow.com/questions/15960129/r-plm-year-fixed-effects-year-and-quarter-data A.K. On Friday, February 14, 2014 7:57 AM, Ramesh Chandra Das <rameshchandrada...@gmail.com> wrote: Sir, can you solve my problem. I did not get why this type of problem is there. duplicate couples (time-id)Error in pdim.default(index[[1]], index[[2]]) : Thanks and regards ======================================================== Ramesh Chandra Das Doctoral Student Vinod Gupta School of Management Indian Institute of Technology, Kharagpur, West Bengal, India, PIN - 721 302 Phone: 91+ 9002883115 [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.