# Deterministic simulation and impulse response

**URL:** <https://forum.dynare.org/t/deterministic-simulation-and-impulse-response/17070>\
**Category:** Perfect foresight simulations\
**Created:** [6 December 2020 12:49 UTC](https://forum.dynare.org/t/deterministic-simulation-and-impulse-response/17070 "2020-12-06T12:49:36Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [7 December 2020 09:23 UTC](https://forum.dynare.org/t/deterministic-simulation-and-impulse-response/17070/2 "2020-12-07T09:23:59Z")

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I am not sure I understand the question. What has nonlinearity to do with it? Did you mean

> [@Stoch\_simull(order=1) and news shocks](https://forum.dynare.org/t/stoch-simull-order-1-and-news-shocks/6282):
>
> Dear all, I have a stupid and embarrassing question to ask. I let dynare solve my DSGE model by choosing a first order Taylor approximation (i.e. stoch\_simull(order=1,…) ). However, we know that 1st order linearizations yield the certainty equivalence property. Since my model contains news shocks, is there a conflict regarding the approximation number? As we know it is quite complicated to introduce news shocks into perfect foresight models. Many thanks in advance for your help. Best Robert

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