st: coding categorical variables

["Sharif S. Aly" <saly@ucdavis.edu>]

Hello everyone,
I was reading the stata 10 "Longitudinal/ panel data" book specifically 
xtmelogit example page 233 and came across a model with "child", a 
categorical variable of 3 levels (if I read this correctly) that was 
coded in the syntax of the fixed effects if the model as "child*" What 
does the star (*) imply?
Best regards,
Sharif

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