# Change in Measurement error variance

**URL:** <https://forum.dynare.org/t/change-in-measurement-error-variance/6155>\
**Category:** Dynare help (legacy posts)\
**Created:** [19 April 2017 20:38 UTC](https://forum.dynare.org/t/change-in-measurement-error-variance/6155 "2017-04-19T20:38:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![DMMUser](https://forum.dynare.org/letter_avatar_proxy/v4/letter/d/dbc845/32.png) [@DMMUser](https://forum.dynare.org/u/DMMUser)\
**Post date:** [19 April 2017 20:38 UTC](https://forum.dynare.org/t/change-in-measurement-error-variance/6155/1 "2017-04-19T20:38:30Z")

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Hi,

I want to know if there is a way to change the variance of Measurement error through time, I mean, is it possible to change the variance of a measurement error or a shock in an especific moment of time?

Thanks in advance

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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:** [20 April 2017 07:11 UTC](https://forum.dynare.org/t/change-in-measurement-error-variance/6155/2 "2017-04-20T07:11:04Z")

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What you describe is essentially a structural break where a parameter (permanently) changes. With the current Dynare version that is not possible. We are still working on this feature. See also [[How to set different priors for trend growth rates](https://forum.dynare.org/t/how-to-set-different-priors-for-trend-growth-rates/5721/1))