An ASCII data file with 3 variables per record as seen in "sample data set".
The three variables are id, score, and indicator for exposure (1 for exposed,
0 for not exposed). They need to be space delimited and arranged in the
above order.
To test run this macro, copy the program and sample data set into your computer,
in the end of the program, add:
%cluswilcox_subunitspec(data=bal.dat);
or, add:
%cluswilcox_subunitspec(data=unbal.dat);
then run it. See "sample output" for resutls.