Population growth and endogenous variables

I’m working with IFPRI standard CGE model and I’m extending the model into recursive dynamic CGE model.
I included population growth in the model as follows:

  • Population growth
    n(t) = PART(t,‘n’);
    n1 = SUM[t1,n(t1)];
    pop(t1) = 1;
    loop{t$[ORD(t) gt 1],
    pop(t) = pop(t-1)*[1+n(t-1)];
    };

The population growth was added to endogenous variables. However, when solving the model, the values of the variables do not change over time.