COMPUTE momtrad = westmom - tradmom .
VARIABLE LABELS momtrad 'Mother was traditionally chinese' .
EXECUTE .

COMPUTE dadtrad = westdad - traddad .
VARIABLE LABELS dadtrad 'Father was traditionally chinese' .
EXECUTE .

IF (momtrad <= 0) mtradgr = 0.
IF (momtrad > 0) mtradgr = 1 .
EXECUTE .

IF (dadtrad <= 0) dtradgr = 0.
IF (dadtrad > 0) dtradgr = 1 .
EXECUTE .