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# Re: st: RE: slope for each individual

 From Yoshiro Nagao To statalist@hsphsun2.harvard.edu Subject Re: st: RE: slope for each individual Date Fri, 7 Apr 2006 20:38:20 +0900 (JST)

```Dear Maarten,

Although I have never used matrices features
of STATA, your do file worked quite well.

However, this programme stops where
there is a missing value of "id".

How can it be modified so that
it does not stop at a missing
value of "id"?

Your further assistance would be appreciated.

Yoshiro

--- Maarten Buis <M.Buis@fsw.vu.nl> からのメッセージ：
> Yoshiro:
> The simplest solution is to estimate the separate
> regressions and store the estimates, but in each
> regression you only use six observations. In the
> code below the estimates are stored in the matrix be
> where the first column is the district id and the
> second the slope.
>
> reg population year if id == 1
> mat b = 1, _b[year]
> forvalues i = 2/1000{
> 	reg population year if id == `i'
> 	mat b = b \ `i' , _b[year]
> }
>
> 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 Z214
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On
> Behalf Of Yoshiro Nagao
> Sent: vrijdag 7 april 2006 8:11
> To: statalist@hsphsun2.harvard.edu
> Subject: st: slope for each individual
>
> I have such a dataset as follows:
> ************************************
> district ID,year,population
> 1,1998,2000
> 1,1999,2010
> 1,2000,2020
> 1,2001,2030
> 1,2002,2040
> 1,2003,2050
> 2,1998,1000
> 2,1999,1010
> 2,2000,1020
> 2,2001,1030
> 2,2002,1040
> 2,2003,1050
> ....
> 1000,2002,4060
> 1000,2003,5000
> ************************************
> For the each district, population
> is recorded every year between
> 1998 and 2003.
>
> I would like to calculate
> individual "regression coefficient (slope)"
> for the each district.
>
> General slope is not of my interest.
>
>
> *
> *   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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```

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