[R] Error in Random Effect Panel

Hard Core gioxc at hotmail.it
Sat Nov 24 17:41:18 CET 2012


I tried to run a Random effect Panel regression and i get this error:

Errore in swar(object, data, effect) : 
  the estimated variance of the individual effect is negative
> 

can you help me trying to understand the problem? (sorry for m bad english)
Thanks to everybody



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