[R] Weights for polr

[Gregory Wawro]

Hello,

I'm estimating an ordered logit model on a probability weighted survey 
sample.  polr permits case weights with the "weights" option, but I cannot 
figure out from existing documentation what it actually does with these 
weights.  I'm concerned about this because I get somewhat different 
results using Stata's ologit command with the pweights option and very 
different results using proc logistic in SAS with its weight option.  So 
my basic question is whether or not it is appropriate to use the weight 
option for polr with my data.

Best,
Greg


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Gregory Wawro               gjw10 at columbia.edu
Associate Professor         phone:  212-854-8540
Dept. of Political Science  fax:    212-222-0598
741 International Affairs   http://www.columbia.edu/~gjw10/
Columbia University
New York, NY 10027

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