# Non-linear vs Log-linearized Model

**URL:** <https://forum.dynare.org/t/non-linear-vs-log-linearized-model/11924>\
**Category:** General DSGE Modeling\
**Created:** [2 June 2018 02:07 UTC](https://forum.dynare.org/t/non-linear-vs-log-linearized-model/11924 "2018-06-02T02:07:23Z")\
**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:** [30 July 2021 19:34 UTC](https://forum.dynare.org/t/non-linear-vs-log-linearized-model/11924/4 "2021-07-30T19:34:16Z")

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It seems you are missing an `exp()` around some exogenous processes like `A`. Otherwise, you will have TFP be mean 0.

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