Dear Zhang Shuang:
I have had another look at your commands and it appears you want to calculate marginal effect of
the interaction terms. I you want to make sence out of interaction terms than this is certainly
the wrong way to do it. Have another close look at:
http://www.stata.com/support/faqs/stat/mfx_interact.html and threads started with
http://newwww.stata.com/statalist/archive/2004-11/msg00254.html and
http://www.stata.com/statalist/archive/2004-11/msg00346.html . There are also user-programmed
Stata tools that will help you with interpreting interaction terms: -findit interaction- will show
them.
HTH,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z214
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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