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st: Conformability error r(503) with areg


From   Lauren Jones <[email protected]>
To   [email protected]
Subject   st: Conformability error r(503) with areg
Date   Thu, 18 Jul 2013 15:24:01 -0400

I've just started using Stata 13.

I'm getting a conformability error r(503) with areg when I run a model
which did not produce such an error in Stata12. Here's my code:

areg resscl CloseAge `controls' i.yob i.yob#i.provfed, absorb(fedea)
vce(cluster yob)

where provfed is a county indicator, and fedea is a subcounty indicator
(smaller than provfed). CloseAge varies by yob/sub-county, and
everything in the `controls' vector varies by individual.

When I ran this model in Stata 12, I would get many of the following warnings:
i.1940#i.provfed6131 s omitted because of collinearity...

However, the model would still run and produce coefficient and
standard error estimates for all regressors, excluding the omitted
yob/county controls.

Now that I have updated to Stata 13, the model gives me the warning
messages, but terminates with the Comformability Error r(503) message
without producing estimates.

Any ideas?

Thanks!
Lauren Jones
Cornell University
[email protected]
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