time periods in dynare

Hello,
How can we include t term in the equation. For example; in Kaltenbrunner and Lochstoer (2010), the productivity equation is given by Zt = exp (mu x t + zt)
If I write the code in Dynare,
Z=mu*t+z;
But does dynare read t as the tTH period value where t=1,2.....
If it does not, how can I can specify the t variable in the dynare code.
Looking forward to your reply.
Best,
Ammu
How can we include t term in the equation. For example; in Kaltenbrunner and Lochstoer (2010), the productivity equation is given by Zt = exp (mu x t + zt)
If I write the code in Dynare,
Z=mu*t+z;
But does dynare read t as the tTH period value where t=1,2.....
If it does not, how can I can specify the t variable in the dynare code.
Looking forward to your reply.
Best,
Ammu