Age Groups, interaction with sex category PLUS Quarterly dummies, i.e.: MODEL: CON1= A_M_A1*WIN1*(SEX=M)*(AGE_GROUP=1)+ ... +A_M_A6*WIN1*(SEX=M)*(AGE_GROUP=6)+ A_F_A1*WIN1*(SEX=F)*(AGE_GROUP=1) + ... + A_F_A6*WIN1*(SEX=F)*(AGE_GROUP=6)+ A_Q1*(Quarter=1)+...+A_Q4*(Quarter=4) Number of observations = 456 E'PZ*E = .739944E-32 Standard Parameter Estimate Error t-statistic P-value A_M_A1 .235266 .175687 1.33912 [.181] A_M_A2 .533794 .111612 4.78260 [.000] A_M_A3 .141523 .025877 5.46913 [.000] A_M_A4 .308216 .211839 1.45496 [.146] A_M_A5 .470767 .153876 3.05938 [.002] A_M_A6 .740449 .123276 6.00646 [.000] A_F_A1 .404279 .264354 1.52931 [.126] A_F_A2 .576196 .141904 4.06048 [.000] A_F_A3 .260425 .189903 1.37136 [.170] A_F_A4 .331638 .154801 2.14235 [.032] A_F_A5 .488507 .159682 3.05925 [.002] A_F_A6 .091206 .104515 .872665 [.383] A_Q1 5.44727 1.27567 4.27011 [.000] A_Q2 5.16043 1.32060 3.90766 [.000] A_Q3 3.67599 1.15047 3.19521 [.001] A_Q4 4.01836 1.16585 3.44670 [.001] Standard Errors computed from heteroscedastic-consistent matrix (Robust-White) Dependent variable: CON1 Mean of dep. var. = 10.5024 Std. error of regression = 9.50037 Std. dev. of dep. var. = 11.2242 R-squared = .307319 Sum of squared residuals = 39713.1 Adjusted R-squared = .283705 Variance of residuals = 90.2570 Durbin-Watson = 1.83254 [<.196]