Thank you very much.
To make it clear, let's forget what I have said.
What I want to know is, since dy/dx is the approximate slope and it should be explained as how much y will change respect to one unit change of x. In this case, I guess it will be right if we devide the value of the slope by 100 in order to know how much y will change respect to 1/100 unit change of x.
Best,
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 Nick Cox
Sent: 2006年10月2日 15:44
To: [email protected]
Subject: st: RE: RE: RE: RE: RE: RE: st: ´ð¸´: st: How to choose a proper model if the dependent variable is within bounds?
Stata does not know anything about your variables
that you have not told it. Thus, if you use certain
units in your dataset, but wish to change to other
units, the translation is your responsibility.
I don't know if this answers the question, which
doesn't seem at all clear to me: for example, what
is reality, independent of choice of units?
Nick
[email protected]
Cheng, Xiaoqiang
> 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?
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