Dear all,
I want to use mtreatreg command and i have categorial variables. The command i use:
mtreatreg Y X1 ib1.X2, mtreat(treatment = X1 ib1.X2 X3) sim(20) density(normal) basecat(1)
But i get this error message:
factor variables and time-series operators not allowed
r(101);
i need help to resolve this problem