Hi Arne, thanks a lot for your reply, it was really helpful!
Now, after having managed to apply the censReg to my data, I get the following error message when I enter the command "summary()": Error in printCoefmat(coef(x, logSigma = logSigma), digits = digits) : 'x' must be coefficient matrix/data frame What does that mean? Actually, I fear that maybe the number of observations (total: 52; uncensored: 48) is too small. Is that possible? -- View this message in context: http://r.789695.n4.nabble.com/Tobit-model-with-panel-data-tp4689760p4689846.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
