# Calibrating/Estimating DSGE models for two time periods

**URL:** <https://forum.dynare.org/t/calibrating-estimating-dsge-models-for-two-time-periods/4489>\
**Category:** Dynare help (legacy posts)\
**Created:** [20 February 2015 02:47 UTC](https://forum.dynare.org/t/calibrating-estimating-dsge-models-for-two-time-periods/4489 "2015-02-20T02:47:06Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\
**Post date:** [15 March 2015 17:58 UTC](https://forum.dynare.org/t/calibrating-estimating-dsge-models-for-two-time-periods/4489/4 "2015-03-15T17:58:37Z")

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Sorry, but I don’t understand the exercise you are doing. You need to describe it in a more systematic way.

With stoch\_simul, there is no point in dating your data. You just have a bunch of artificial time periods after you start simulations.

For the dummy variables, see [[Using dummy variables in dynare](https://forum.dynare.org/t/using-dummy-variables-in-dynare/4539/1)). Essentially, you define rhoa and rhob as variables and provide an observed variable series that takes on the values you describe.

If you are talking about stoch\_simul, use the simul\_replic. However, you did not describe what the uncertainty is about you are trying to simulate.

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