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Re: st: DiD
From
[email protected]
To
inggrid <[email protected]>
Subject
Re: st: DiD
Date
Tue, 29 Mar 2011 14:06:57 +0200
> gen post05 = year>2000
> gen treat_post05 = treat*post05
> note: post05 omitted because of collinearity
> note: treat_post05 omitted because of collinearity
May be "post05" has been omitted because it's always equal to 1, and treat_post05 because it's always equal to "treat". I guess you misspecified the condition of post05 (it shouldn't be "year>2000", but "year>2004" or "year>2005").
Federico
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