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Re: st: panel data manipulation


From   "Clive Nicholas" <Clive.Nicholas@newcastle.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: panel data manipulation
Date   Sat, 14 Aug 2004 02:12:38 +0100 (BST)

Caglar Kamu wrote:

> I have a fairly long unbalanced panel which is set by tsset id year. I am
> trying to estimate a pooled linear model within the time period 1987-1997
> such as below.
>
> Y_i(t) = X_i(t) + X_i1987 + X_i1988+....+X_i1997
>
> i:1...N while t:1987..1997
>
> How should I manipulate the variables such that I can include all the past
> and future explanatory variables in the regression above?

Create dummy variables for your year terms if you haven't already.

For your explanatory variables, use the -l.- operator to create lagged terms

. gen lagvar=l.var

and the -f.- operator to create lead terms

. gen leadvar=f.var

I hope this helps.

CLIVE NICHOLAS        |t: 0(044)191 222 5969
Politics              |e: clive.nicholas@ncl.ac.uk
Newcastle University  |http://www.ncl.ac.uk/geps
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