. gen x=0

. replace x=1 if standard_Pincome<0 & standard_educ<1
(531 real changes made)

. replace x=1 if 0<standard_Pincome<2 & standard_educ<-0.5
(42 real changes made)

. replace x=3 if 0<standard_Pincome>2 & standard_educ>-0.5
(40 real changes made)

. replace x=3 if 0<standard_Pincome>2 & standard_educ>1
(0 real changes made)