name delobs 'Deleting some observations permanently from a dataset' ;
?
? There are no built-in features in TSP for automatically deleting 
? observations and renumbering (i.e. MERGE) at the moment.
? SORT(ALL) may be helpful to reorder one or both datasets.
? If you can construct a special sorting variable which will get things
? in the right order, and also sort the extra observations to the "top" of
? the SMPL, then you can truncate the series to get rid of the extra obs.
? For example, say you want to sort by FIRMID, and also delete the firms
? numbered 100, 200, and 300:
? TSP 4.2B (October 1994)
? Author: Clint Cummins
?
MSD(NOPRINT) FIRMID;  ? TO CALCULATE MAX(FIRMID)
SELECT FIRMID=100 .OR. FIRMID=200 .OR. FIRMID=300;  FIRMID = @MAX+1;
SET NEWNOB = @NOB;
SELECT 1;
SORT(ALL) FIRMID;
SMPL 1,NEWNOB;
NOREPL;   ? This makes TSP truncate any revised series above NEWNOB.
DOT FIRMID X1 X2 ... ;  ? List all variables in dataset here
GENR . = .;
ENDDOT;