Woolton Lee<[email protected]> :
Probably due to unstable sorting; without further info, hard to diagnose.
Do you have missing values in any of the merge vars?
This is a potentially very serious problem; see e.g.
#4 in http://www.princeton.edu/~jrothst/hoxby/rejoinder.pdf
On Fri, Aug 14, 2009 at 10:28 AM, Woolton Lee<[email protected]> wrote:
> Hi I am getting a problem where I am merging two datasets together and
> the N in the resulting dataset can change if I rerun the program 2 or
> more times. I am merging by company code (COCODE) and year which do
> not uniquely identify observations in the using dataset, but it seems
> to me that that should not matter. I get the same result if I use the
> joinby command - the resulting N in the dataset changes if I rerun the
> program. I am trying to understand why this might happen and am
> stumped at the moment. Does anyone have any suggestions?
>
> W
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