CONJOINT PLAN='/DATA/CARPLAN.SAV'
/FACTORS=SPEED (LINEAR MORE) WARRANTY (DISCRETE MORE)
PRICE (LINEAR LESS) SEATS
/SUBJECT=SUBJ /RANK=RANK1 TO RANK15 /UTILITY='UTIL.SAV'.
- The
PLAN subcommand
specifies the IBM® SPSS® Statistics data file CARPLAN.SAV as the plan file containing the
full-concept profiles. Because there is no DATA subcommand, the active dataset is assumed to contain
the subjects’ rankings of these profiles.
- The
FACTORS subcommand
specifies the ways in which the factors are expected to be related
to the rankings. For example, speed is expected to be linearly related
to the rankings, so that cars with higher speeds will receive lower
(more-preferred) rankings.
- The
SUBJECT subcommand
specifies the variable SUBJ in
the active dataset as an identification variable. All consecutive
cases with the same value on this variable are combined to estimate
utilities.
- The
RANK subcommand
specifies that each data point is a ranking of a specific profile
and identifies the variables in the active dataset that contain these
rankings.
-
UTILITY writes
out an external data file named UTIL.SAV containing the utility estimates and associated statistics for each
subject.