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Dear all,

I have a three-level linear model. The null model proves to have very low unexplained variance at the third level (VPC's of lower than 10%). However, If I introduce one particular third level variabel (categorical variable), it proves to be highly significant and to have the highest z ...

Thank you very much!!
Marjolijn

Thank your so much!

The "xi"-solution, however, gave me a new error-message saying "r(101) interaction not allowed". I searched the web and found that this means that a command (I supose the xi-command) isn't adjusted at the stata-version I use. Inculding 'version 10.1" didn't solve the problem ...

Hi,

How should I include categorical predictor variables in the random part of my model? Just entering “i.variable” gives the following message: i: operator invalid. Do I need to dumify the variables that I want to enter? Does this gives the same result as the procedure in MLwiN?

Thank you very ...