st: How to find out if there are different variables in different wavesof survey data

["Sam Rawlings, Social Sciences and Law 03" <sr3209@bristol.ac.uk>]

Dear Statalisters,

I have data on the National Family Health Survey (NFHS) for India for two 
waves of the survey - 92-93 and 98-99. The data I have is pooled for these 
two waves and I have a dummy variable for each survey (named NFHS92 and 
NFHS98) where the dummy var = 1 if the observation came from that wave and 
= 0 if it did not (i.e. NFHS92 is the dummy for the 92 survey, and all obs 
which are from 1992 have NFHS92=1).

My question is this: I would like to know if there are some variables which 
are present in one survey but not the other - and am wondering whether 
there is a way this could be done in Stata.

Currently I am just describing the data by the group NFHS92 -  this results 
in a (very) lengthy list of vars and I am looking for cases where N=0 as 
indication that that variable is not present in a particular wave of the 
survey. Is there an easier, or perhaps more sophisticated way to do this, 
with less output?

Any help would be appreciated,

Sam Rawlings

----------------------
SB Rawlings, Social Sciences and Law 03
sr3209@bristol.ac.uk
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