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Re: st: prediction after y-logged regression


From   Richard Goldstein <richgold@ix.netcom.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: prediction after y-logged regression
Date   Mon, 02 Jun 2008 08:27:51 -0400

type -findit predlog-

Rich

Shehzad Ali wrote:
Hi Listers,

I am running a regression in which y variable is logged (semi-logarithmic). The literature suggests that in order to get an anti-logged prediction of yhat, one should proceed like this:

1. Run the regression and predict yhat,

2. Then exponentiate the predicted yhat, and finally

3. Mutiply the exponentiated predicted yhat by the mean value of residuals from the regression (otherwise known as smearing).

I was wondering if there is a direct way to do it in stata or if there is any other method that experts would suggest to get anti-logged prediction.

Thank you,

Shehzad

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