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st: Standard deviation of the error term in asclogit


From   esther adler <ester_adler@yahoo.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Standard deviation of the error term in asclogit
Date   Thu, 8 Sep 2011 14:04:01 +0100 (BST)

I have a dataset whereby each of a number of individuals are presented with a number of menus, each menu consisting of a number of options, of which they must choose one. The same set of menus is presented to each individuals. I run asclogit (as well as asmprobit and mixlogit) on the data. 

My issue is that I have reasons to believe my individuals have different standard errors for their error term; by this I mean that some are more "accurate" than others in their choice. Is there a way I can get Stata to take account of this?

Also, since I have variables that I suppose may explain how accurate the individual is in her choices (for example, mathematical proficiency and education), is there a way to get the std error or the error term to depend on this?

Thanks!

Ester

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