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Re: Metro samples

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At 09:48 AM 6/1/2005 -0400, Tom Sanchez wrote:

>From: American Housing Survey (AHS) ListServ <ahs@huduser.gov>
>
>I'm trying to perform analyses comparing units in one time period with a
>subsequent time period. For four particular metros that I'm using I noticed
>that the control codes are different from one year (sample) to the next.
>
>Baltimore1991 & 1998
>Denver1990 & 1995
>San Fran 1993 & 1998
>DC 1993 & 1998
>
>Is there a way to match observations from one year to the next despite the
>difference in control codes?
>
>[...]
>Tom Sanchez
>Virginia Tech
>Urban Affairs and Planning
>Office: 703-706-8112
><http://www.nvc.vt.edu/uap/>http://www.nvc.vt.edu/uap/
>
>[...]

I know that Baltimore received a new sample in 1998, and thus, you cannot
match between 1998 and an earlier year. The lack of matching between the
control numbers reflects that fact. The others presumably also received
new samples, though I don't have any definite information on them. There
is probably some documentation on this somewhere.
I hope this helps.
-- David
David Kantor
Institute for Policy Studies
Johns Hopkins University
dkantor@jhu.edu
410-516-5404