eList
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?
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Tom Sanchez
Virginia Tech
Urban Affairs and Planning
Office: 703-706-8112
http://www.nvc.vt.edu/uap/