program define spregxt16 version 11.0 qui { args lf XB ZB Rho1 Rho2 Rho3 Rho4 Sigma tempvar Ro1 Ro2 Ro3 Ro4 rYW1 rYW2 rYW3 rYW4 D0 D1 gen `D0'=0 gen `D1'=0 replace `D0' =1 if $ML_y1 ==spat_llt replace `D1' =1 if $ML_y1 > spat_llt gen double `Ro1' =`Rho1'*mstar_W1 gen double `Ro2' =`Rho2'*mstar_W2 gen double `Ro3' =`Rho3'*mstar_W3 gen double `Ro4' =`Rho4'*mstar_W4 gen double `rYW1'=`Rho1'*w1y_$ML_y1 gen double `rYW2'=`Rho2'*w2y_$ML_y1 gen double `rYW3'=`Rho3'*w3y_$ML_y1 gen double `rYW4'=`Rho4'*w4y_$ML_y1 replace `lf' = log(1-`Ro1'-`Ro2'-`Ro3'-`Ro4') /// +`D0'*log(normal(-(`rYW1'+`rYW2'+`rYW3'+`rYW4'+`XB')/((`Sigma'*exp(`ZB'))))) /// -0.5*log(2*_pi)-0.5*log(((`Sigma'*exp(`ZB')))^2) /// -0.5*`D1'*($ML_y1-`rYW1'-`rYW2'-`rYW3'-`rYW4'-`XB')^2/((`Sigma'*exp(`ZB')))^2 } end