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Re: st: Create loop for dummy interactions


From   Michael Barker <[email protected]>
To   [email protected]
Subject   Re: st: Create loop for dummy interactions
Date   Thu, 6 Feb 2014 09:42:30 -0500

If you just want to include these in a regression, use factor variables:

help fvvarlist
i.year##i.state

If you want the actual dummies and interactions, use xi
help xi
xi i.year i.state i.year*i.state

Make sure state name is a numeric variable. If it is string, generate
a new numeric variable using encode
help encode


On Thu, Feb 6, 2014 at 9:27 AM, Huang, Bryan <[email protected]> wrote:
> Hi,
>
> I have a panel data set of US state-by-year, and would like to create 1) a loop to generate yearly dummy variables from 1981-2010 and 2) a loop for interaction terms between the year and the state. Would you be able to help me out?
>
> Many thanks in advance. Apologies if it has been asked before, I cannot find it in the archive.
>
> Regards,
>
> Bryan Huang
>
>
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