DEFINE PERSONA.ANOSEST
AS SWITCH
INCASE PERSONA.NIVINS = 0
ASSIGN 0
INCASE PERSONA.NIVINS = 9
ASSIGN 98
INCASE (PERSONA.NIVINS = 4 AND PERSONA.GRADO=0) OR (PERSONA.NIVINS = 4 AND PERSONA.GRADO=1)
ASSIGN 0
INCASE PERSONA.NIVINS = 4
ASSIGN PERSONA.GRADO - 1
INCASE PERSONA.NIVINS = 1 OR PERSONA.NIVINS = 2
ASSIGN PERSONA.GRADO
INCASE PERSONA.NIVINS = 3
ASSIGN PERSONA.GRADO + 6
INCASE PERSONA.NIVINS = 5
ASSIGN PERSONA.GRADO + 9
INCASE PERSONA.NIVINS = 6 OR PERSONA.NIVINS = 7
ASSIGN PERSONA.GRADO + 12
INCASE PERSONA.NIVINS = 8
ASSIGN PERSONA.GRADO + 18
ELSE 99
VARLABEL "Años de estudio"
VALUELABELS
98 "Se ignora"
99 "Menores 5 años"
TYPE INTEGER
RANGE 0 - 99

TABLE A3
AS AVERAGE OF PERSONA.ANOSEST
BY  PERSONA.CIUHORD58 BY   PERSONA.CIUAORD58
FOR PERSONA.EDAD>24 AND PERSONA.EDAD<40 AND PERSONA.ANOSEST<22