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st: mfx - conditional and unconditional elasticities


From   Even Bergseng <even.bergseng@umb.no>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: mfx - conditional and unconditional elasticities
Date   Thu, 20 Dec 2007 16:31:20 +0100

I want to use -mfx- to compute elasiticities after -tobit/xttobit-. My interpretation is that the commands

. mfx compute, eyex predict(ystar(0,.))
. mfx compute, eyex predict(e(0,.))

should produce respectively unconditional (all observations) and conditional (non-limit observations) elasticities. Am I correct?

If so: Both elasticities are interpreted at the mean of all observations. Would it be logical to use mean values for the non-limit sample to produce the conditional elasticities? (i.e. add the option at(avg) to mfx where avg is means for the non-limit sample).

Best regards,
____________________________________________
Even Bergseng
Dep. of Ecology and Natural Resource Mangement,
Norwegian University of Life Sciences



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