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st: QUAIDS question


From   Derya Karaci <dkaraci@yahoo.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: QUAIDS question
Date   Tue, 1 Nov 2011 08:14:04 -0700 (PDT)

Hi, 

I have a few questions about the estimation of the QUAIDS model (the program by Brian Poi). They may sound trivial but any help will be greatly appreciated! 

- I was wondering if one needs to normalize prices to estimate the elasticites. I am using a cross-sectional survey, so I can not compute a price index over time but I can normalize using the regional variation.  
- Is it possible to incorporate demand shifters in this model? I included two dummy variables and household size under the nlsur command but is it appropriate? 
- Is there a way to recover the standard errors of the elasticities? 

Many thanks in advance! 

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