Statalist The Stata Listserver


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: -mfx-


From   Maarten buis <[email protected]>
To   [email protected]
Subject   Re: st: -mfx-
Date   Sat, 23 Sep 2006 14:16:37 +0100 (BST)

Nishant:
Stata doesn't know that you previously logged a variable. It just sees
a column in your dataset that contains numbers, what they mean or what
you've done to it, Stata does not know. 
HTH,
Maarten

--- Nishant Dass <[email protected]> wrote:
> I would like to be able to make a statement like "a 1%
> change in lnx results in so many % change in y", so which
> of the following would be correct?
> 
>     mfx c, var(lnx) dyex
> OR
>     mfx c, var(lnx) dydx
> 
> The cause of confusion is whether Stata takes the logarithm
> of a variable or uses an already-"logged" variable in
> calculating the marginal effects.  (If it simply uses
> already-"logged" variables, then what is the use of options
> other than "dydx"?)


-----------------------------------------
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/
-----------------------------------------


		
___________________________________________________________ 
Try the all-new Yahoo! Mail. "The New Version is radically easier to use" � The Wall Street Journal 
http://uk.docs.yahoo.com/nowyoucan.html
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index