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Re: st: Fwd: How to interprete dummy variables used for missing values


From   Alan Neustadtl <alan.neustadtl@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Fwd: How to interprete dummy variables used for missing values
Date   Sat, 12 Feb 2005 07:56:03 -0500

It would be easier to help you if you could show us an examnple model
that you want to estimate and indicate which variable(s) are dummy
variables.  Seeing a dependent variable and at least one or two
independent measure would be helpful.

Having said that, if you regress a continuous measure on a single
dependent dummy measure, the result is simply a difference of two
means t-test.  The two means being compared are the mean of the
dependent measure vor the group coded zero compared to the mean of the
dependent measure for the group coded one.

Best,
Alan


On Fri, 11 Feb 2005 21:08:10 -1000, Quang Nguyen <quangn@gmail.com> wrote:
> Hi Daniel,
> 
> Thanks so much for showing me how to create indicators for the year.
> It is very helpful. That said, I am not sure how I can interpret the
> findings. Supposedly, I run a regression of some variables, e.g.,
> Savings on Investement and the new variable, then how I can interprete
> the coeficients?
> 
> Thanks again. I highly appreciate it.
> 
> Have A Wonderful Day!
> Sincerely yours,
> 
> Quang
> 
> On Sat, 12 Feb 2005 00:48:28 -0500, Daniel Egan <dp.egan@gmail.com> wrote:
> > Hi Quang,
> >
> >
> > > My friend has a panel data in the following format:
> > >
> > > Year        Investment
> > > 1900        . (Missing value)
> > > 1930        .
> > > 1960        12
> > > 1980         .
> > > 1990        28
> > > 1991        56
> > > 1992        35
> > > 1993        45
> > > etc.,
> > >
> > > Could you please tell me how she can use the dummy variables for this
> > > exercise (regression)? Also, how she can interprete the coeficients
> > > for Investment and the dummy variables?
> > >
> >
> > If you are asking how to create indicators for the years that have
> > missings, simply
> >
> > gen missdum=0
> > replace missdum=1 if investment==.
> >
> > If this is not what you mean, you will need to explain what you want
> > to do further.
> > *
> > *   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/
> >
> *
> *   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/
>
*
*   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/



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