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st: =?utf-8?Q?RE=3A_RE=3A_RE=3A_RE=3A_st=3A_=C2=B4=C3=B0=C2=B8=C2=B4=3A_st?==?utf-8?Q?=3A_How_to_choose_a_proper_model_i?==?utf-8?Q?f_the_dependent_variable_is_with?==?utf-8?Q?in_bounds=3F?=

From   "Maarten Buis" <>
To   <>
Subject   st: =?utf-8?Q?RE=3A_RE=3A_RE=3A_RE=3A_st=3A_=C2=B4=C3=B0=C2=B8=C2=B4=3A_st?==?utf-8?Q?=3A_How_to_choose_a_proper_model_i?==?utf-8?Q?f_the_dependent_variable_is_with?==?utf-8?Q?in_bounds=3F?=
Date   Mon, 2 Oct 2006 15:05:10 +0200

Xiaoqiang Cheng
These questions are answered by the helpfileof -mfx-: 
-mfx- will also work for -probit-, -logit- and 
-tobit-. In case of -probit-, and -logit- I actually 
prefer -prchange-, which is part of the -spost- 
package (see -findit spost-). For -tobit- there also 
exist the -dtobit- user written command (see: 
-findit dtobit-). You can specify the values of x at which 
you want to calculate the marginal effect  with the at() 
option, see -help mfx-.

Maarten L. Buis
Department of Social Research Methodology 
Vrije Universiteit Amsterdam 
Boelelaan 1081 
1081 HV Amsterdam 
The Netherlands

visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z434 

+31 20 5986715

-----Original Message-----
From: []On Behalf Of Cheng, Xiaoqiang
Sent: maandag 2 oktober 2006 14:46
Subject: st: RE: RE: RE: st: ´ð¸´: st: How to choose a proper model if the dependent variable is within bounds?
how to specify a certain value of x if I want to predict the dy/dx using -mfx- for the certain value of x? And is there any similar postestimation command like -mfx- for -probit-, -logit- and -tobit-?


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