去中心化 center X Z

ssc install center

reg Y X Z i.id i.year,r

est store m1

gen NEW1=X * Z

reg Y X Z NEW1 i.id i.year,r

est store m2center X Z

gen NEW= c_X * c_Z

reg Y X Z NEW i.id i.year,r

est store m3

esttab m1 m2 m3 using reg1.rtf, replace b(%6.4f) se(%6.4f) se ar2(4) star(* 0.1 ** 0.05 *** 0.01) compress nogap mtitles("model1" "model2" "model3") title("Table1")