Nick
[email protected]
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Cheng,
> Xiaoqiang
> Sent: 02 October 2006 14:39
> To: [email protected]
> Subject: st: RE: RE: RE: RE: RE: st: ´ð¸´: st: How to choose a proper
> model if the dependent variable is within bounds?
>
>
> Thank you very much.
>
> Can we think an alternative of your previous suggestion about
> the prediction of dy/dx when it exceeds unit?
>
> One example will be: if the prediction exceeds unit and x is
> counted in 100s (one unit of x in sample data means 100 in
> reality. For instance, x stands for kilometres. In reality,
> the distance from Brussels to Leuven is 20 km, but in our
> sample we count the distance as 0.2), can we interpret the
> dy/dx by, lets say, one unit of x increase in reality, the y
> will increase (dy/dx)/100?
>
> Xiaoqiang Cheng
>
> University of Leuven
> Tel +32 16 326853
> Fax +32 16 326796
> Mail Xiaoqiang Cheng
> Center for Economic Studies
> University of Leuven
> Naamsestraat 69
> Leuven, Belgium
> B3000
> Url www.econ.kuleuven.be/xiaoqiang.cheng
>
>
>
>
> -----Original Message-----
> From: [email protected]
[mailto:[email protected]] On Behalf Of Maarten Buis
Sent: 2006年10月2日 15:05
To: [email protected]
Subject: st: RE: RE: RE: RE: st: ´ð¸´: st: How to choose a proper model if the dependent variable is within bounds?
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-.
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 Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of Cheng, Xiaoqiang
Sent: maandag 2 oktober 2006 14:46
To: [email protected]
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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*
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