Iteractions sex and education categories, i.e.,

 MODEL: CON1= A_M_E1*WIN1*(SEX=M)*(EDUC=1) + ... + A_M_E4*WIN1*(SEX=M)*(EDUC=4)+
              A_F_A1*WIN1*(SEX=F)*(EDUC=2) + ... + A_F_A6*WIN1*(SEX=F)*(EDUC=4)

 Number of observations = 456  E'PZ*E = .138678E-32

                          Standard
 Parameter  Estimate        Error       t-statistic   P-value
 A_M_E1     .768123       .124985       6.14572       [.000]
 A_M_E2     .638614       .104594       6.10562       [.000]
 A_M_E3     .183316       .051086       3.58836       [.000]
 A_M_E4     .430673       .216418       1.99001       [.047]
 A_F_E1     .645620       .130749       4.93788       [.000]
 A_F_E2     .391952       .131650       2.97723       [.003]
 A_F_E3     .584599       .129775       4.50472       [.000]
 A_F_E4     .759252       .208562       3.64042       [.000]

 Standard Errors computed from   heteroscedastic-consistent matrix 
 (Robust-White)

 Dependent variable: CON1
        Mean of dep. var. = 10.5024  Std. error of regression = 10.3924
   Std. dev. of dep. var. = 11.2242                 R-squared = .236239
 Sum of squared residuals = 48384.6        Adjusted R-squared = .224305
    Variance of residuals = 108.001             Durbin-Watson = 1.81073 [<.055]