Specify cross-sectional units 					[STB-21: sts7.4]
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	^csunits^ [ varname [ varname [ ... ] ] ][^, c^lear

specifies the variables that identify cross-sectional units.  ^csunits^ is the
cross-sectional analog of the ^datevars^ command.  You must use ^csunits^ to insure
that the ^lag^ and ^lead^ commands handle panel data correctly.  The ^clear^ option
is a convenience feature; it "erases" the information stored by a previous
^csunits^ command.


Author
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Sean Becketti, Stata Technical Bulletin


Also see
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    STB:  sts4 (STB-15), sts7.4 (STB-21)
On-line:  ^help^ for ^datevars^, ^lag^