# The convergence speed of translation is not fast enough

**URL:** https://forum.dynare.org/t/the-convergence-speed-of-translation-is-not-fast-enough/27632
**Category:** Stochastic simulations
**Created:** [21 May 2025 13:49 UTC](https://forum.dynare.org/t/the-convergence-speed-of-translation-is-not-fast-enough/27632 "2025-05-21T13:49:48Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![JackChou](https://forum.dynare.org/letter_avatar_proxy/v4/letter/j/e47774/32.png) [@JackChou](https://forum.dynare.org/u/JackChou)
#### Post date: [21 May 2025 13:49 UTC](https://forum.dynare.org/t/the-convergence-speed-of-translation-is-not-fast-enough/27632/1 "2025-05-21T13:49:49Z")

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![image](https://forum.dynare.org/uploads/default/original/3X/c/d/cdeceb42a2f453acbe046793e97b0f73b121b9ea.png)  
 ![image](https://forum.dynare.org/uploads/default/original/3X/e/d/edbb4543e5791240711e3ea415de23b2abc59439.png)

`log(tr/steady_state(tr)) = rho_G*log(tr(-1)/steady_state(tr))+(1-rho_G)*psi_y*log(y/steady_state(y))+eTr;` I have a shock eTr with stderr 0.1. Except this var, other variables seem to converge very slowly. Why?

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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: [22 May 2025 06:40 UTC](https://forum.dynare.org/t/the-convergence-speed-of-translation-is-not-fast-enough/27632/2 "2025-05-22T06:40:12Z")

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Have a look at the various threads related to the problem. E.g.

> [@Longlasting IRFs](https://forum.dynare.org/t/longlasting-irfs/13781/2):
>
> That is hard to tell. Most of the times, we actually want out model to feature persistence, i.e. endogenous propagation. In a quarterly model, 50 periods is a bit more then 10 years. That can still be considered a business cycle frequency.