st: Poststratification weights

["Michael I. Lichter" <mlichter@buffalo.edu>]

In the Stata svy commands, what is the difference between creating your 
own poststratification weight (e.g. using -survwgt-) and treating it as 
a pweight (through -svyset [pw=x], strata(y)-) vs. telling Stata 
(through -svyset, poststrata(y) postweight(z)-) that you have a 
postratification variable and cell count? This shouldn't affect point 
estimates, but how does Stata treat the two differently with respect to 
variance calculations or anything else? Thanks. (I would RTFM if I had 
access to one, and I didn't find a FAQ or any discussion on the topic. I 
am using Stata 9.2, FWIW.)

Michael
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