Contemporaneous Expectations

Dear Dynare Forum community,

I would like to include a variant of the taylor rule in my model using Contemporaneous Expectations, so:

r = rn + phi_pie * pie^e_t + phi_y * ytilde^e_t

Now my question would be how to realize these Contemporaneous Expectations in Dynare.

Thanks in advance!
With kind regards

How do you define


The expectation of pie at time t, for example, that I made at time t-1.

Do you mean E_t y_{t+1} or E_{t-1}y_{t+1}?

The first one is already implicitly implemented in Dynare if you write down your equations.

The lagged expectation operator is implemented as EXPECTATION(-1)(y(+1)) .

That also works with


which is E_{t-1}y_t

That’s what I was looking for!
Thanks a lot!