data list list file = "f:\ddsla\ch3raw.dat" /y1 y2 y3 age probbeh.
execute.

VARSTOCASES /ID = id
 /MAKE alcuse FROM y1 y2 y3
 /keep = age probbeh
 /INDEX = time(3).

compute timelin = time-1.
compute timequad = timelin*timelin.
compute int = 1.

* model expressed like a multilevel model.
* Note parameter estimates from SPSS match those
* of Mplus, but Mplus has extra parameters not modeled here.
mixed alcuse with timelin timequad age int
  /fixed = int age timelin timequad timelin*age timequad*age | noint
  /random int timelin timequad | covtype(id) subject(id)
  /print=solution.