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Re: st: Re: Using NEARMRG

From   "Michael Blasnik" <>
To   <>
Subject   Re: st: Re: Using NEARMRG
Date   Wed, 26 Apr 2006 18:55:26 -0400

-nearmrg- calls the Stata command -isid- to check that the variable list uniquely identifies the observations. Have you looked at the data to see if there are duplicates? Perhaps it's a problem with missing values since isid will not allow missing values wihtout specifying the missok option. If that is the problem, I suggest you drop the cases with missing values on either age or region.

----- Original Message ----- From: "MA V" <>
To: <>
Sent: Wednesday, April 26, 2006 6:44 PM
Subject: RE: st: Re: Using NEARMRG

I know you're the author and I thank you for these and many other programs that have helped me a lot.
One of the things I tried was dropping all the duplicates for both region and age in the using file (before doing the merge):
duplicates drop age, force
duplicates drop region, force

This should have made the nearvar unique in the using dataset within levels of the varlist, right?

But I keep getting the same error message.

Another thing that I forgot to mention is that, in my case age is a string variable (and yes, I used the option "upper" to prevent getting error messages related with the fact that the nearvar is a string variable).

If you have any suggestions I would appreciate your help.

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