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Re: st: Identify Panel Structure of Dataset


From   Nick Cox <[email protected]>
To   [email protected]
Subject   Re: st: Identify Panel Structure of Dataset
Date   Mon, 3 Oct 2011 20:21:14 +0100

Look at -xtdescribe-.

Nick

On Mon, Oct 3, 2011 at 7:44 PM,  <[email protected]> wrote:

> I have compiled a dataset with firm-product-year information, e.g.:
>
>
> Firm      Product           t    Salesvalue
> A              1          2000     5000
> A              1          2001     5500
>
> A              2          2000     3000
> A              2          2001     3500
> A              2          2002     4000
>
> B              3          2001      500
> B              3          2002      550
> B              3          2003      710
>
> B              4          2001     2000
> B              4          2002     4000
> ...
> Basically, firms have different products and report info on their products
> for different years. Firm A has info for the years 2000-2001 (Product 1)
> and for 2000-2002 (Product 2) while B reports on Product 3 in 2001-2003
> and in 2001-2001 on Product 4.
> I want to find out which time horizon I should use for my panel to get the
> longest time horizon possible. In this example, I would use t=2001,2002
> since both, A and B report in both years.
>
> How can I do this in Stata?

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