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st: problems with xtivreg fe


From   "jenny.montaldo" <jenny.montaldo@libero.it>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   st: problems with xtivreg fe
Date   Sun, 25 May 2008 19:56:12 +0200

Thanks, Marteen

that's true of course. However, and tell me if I do wrong, when I run a first stage regression of a variable that takes different values any time on a variable that has the same values over time, I get fitted values that are different over time (and I saw it in fact looking at the dataset). Hence, if I then regress these fitted values on the other variables using fixed effects, I do not understand why he drops them, while the fitted values are not constant over time, as other variables.
Thanks again for your and any help
jenny



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