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2012 Nov 28
0
Fixed Effects using AER's Tobit function - system is singular
...and I have the same problem. I can run the regression without any problem if I use factor(Month) + factor(County) instead of the interaction of the effects. Any thoughts? -- View this message in context: http://r.789695.n4.nabble.com/Fixed-Effects-using-AER-s-Tobit-function-system-is-singular-tp4651061.html Sent from the R help mailing list archive at Nabble.com.