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Re: st: RE: How can estimate dicount rate for each household in the panel data


From   Quang Nguyen <quangn@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: How can estimate dicount rate for each household in the panel data
Date   Tue, 17 Feb 2009 09:50:21 -1000

As always, excellent advice by Nick! I highly appreciate it.

Many thanks and Have A Great Day!


On Tue, Feb 17, 2009 at 8:35 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> I wouldn't use -nl- to estimate this rate. On the face of it, it is more
> natural to take logs and then fit a regression in each panel. You can do
> that using -statsby- to pick up the regression slopes. Then -merge- back
> to your original dataset.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Quang Nguyen
>
> I have the following sample data set:
>
>  Household       x       y       t
>  1                   60     120    7
>  1                   120   100   30
>  1                   100   300   60
>  1                    50    250  900
>  ...
>  2
>  2
>  2
>  ...
>  I would like to estimate the discount rate for each household based
> on the fomular: x = y*exp(-rt), where r is the interest rate. I know
> that in Stata we can use: nl (x=y*(exp(*-{r}*t) for each household. My
> questions are:
>
> 1. How we can ask State to do the the above estimate for all household
> at the same time instead of one by one?
>
> 2. How can we save the ESTIMATED discount rates as an variable that
> can be used for latter analysis? For instance, on emay study the
> relationship between the household's discount rate and the educational
> level.
>
>
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>



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