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st: weighted estimation of the Hopit model in gllamm


From   Danilo Cavapozzi <danilo.cavapozzi@unive.it>
To   statalist@hsphsun2.harvard.edu
Subject   st: weighted estimation of the Hopit model in gllamm
Date   Wed, 04 Jul 2012 23:15:56 +0200

Dear all,

I have a question on the use of weights in gllamm. I am estimating the standard Hopit model with anchoring vignettes (as in the example on the gllamm website, http://www.gllamm.org/chopit.pdf). Each individual in the sample contributes with the self-evalutation and the evalutation of vignettes. Then, there are 2 levels: the first one consists of the single evalutations (self-evaluations OR vignette evaluations) and the second consists of ALL the evaluations provided by a given individual. I am not estimating any random effect. I use frequency weights.

Should I apply the same set of frequency weights to both levels by specifying two variables (say weight1 and weight2) that are equal? Or should I apply the weights to one level only? If the latter is true, which level should I consider?

Thanks in advance for any suggestion.

Best,
Danilo

--
Danilo Cavapozzi
Department of Economics, Ca' Foscari University of Venice
Fondamenta San Giobbe, Cannaregio 873
30121 Venezia, Italy
Phone: +39 041 234 9180
Fax: +39 041 234 9176

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