Dear List members,


         MY APOLOGIES IF YOU ALREADY RECEIVED THIS. A COLLEAGUE TOLD ME HE
COULD NOT OPEN MY PREVIOUS MESSAGE.


        I am runnning a logistic regression that includes sample weights
(expressed by a variable called WEIGHT) using glmob (from robustbase). My
model looks like this:

       B12<-glmrob(SERE~COMP+COM,family=binomial,weights=WEIGHT)

       When I include the weights, my standard error columns, as well as the
p-values, show only NAs. If I exclude weights=WEIGHTS, everything works. I
would like to use the weights. Does anyone know what could be the problem?

       Thanks in advance,

                                           Celso

	[[alternative HTML version deleted]]

