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re: st: Marginal effects of interactions in Tobit


From   Christopher Baum <kit.baum@bc.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   re: st: Marginal effects of interactions in Tobit
Date   Mon, 24 Dec 2012 17:08:01 +0000

<>
Ebru said

I wanted to obtain marginal effects of interaction terms in Tobit regression. Altough there are some examples given by Stata FAQ page http://www.stata.com/support/faqs/statistics/marginal-effects-after-interactions/ there is no example for Tobit estimation. I am particularly interested in marginal effects of quadratic term in Tobit? Can you explain how to do it for Tobit? 

sysuse auto,clear
generate wgt=weight/1000
tobit mpg c.wgt##c.wgt, ll(17)
margins, dydx(wgt)
margins, dydx(wgt) at(wgt=(1.75(0.5)4.75)) vsquish
marginsplot

Kit


Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
                             An Introduction to Stata Programming  |   http://www.stata-press.com/books/isp.html
  An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html


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