# Problem with estimating on empirical data

**URL:** <https://forum.dynare.org/t/problem-with-estimating-on-empirical-data/16899>\
**Category:** ML/Bayesian estimation\
**Created:** [8 November 2020 15:30 UTC](https://forum.dynare.org/t/problem-with-estimating-on-empirical-data/16899 "2020-11-08T15:30:34Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![helenaholm](https://forum.dynare.org/letter_avatar_proxy/v4/letter/h/e47774/32.png) [@helenaholm](https://forum.dynare.org/u/helenaholm)\
**Post date:** [12 November 2020 12:26 UTC](https://forum.dynare.org/t/problem-with-estimating-on-empirical-data/16899/21 "2020-11-12T12:26:15Z")

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1. It was a tipping error as I have tried to include/exclude the equation and then missed a log - that does dot change the error message unfortunately.

2. I follow your point, but i think it is because i’m not quiet sure how to include the extra shock to c\_obs relative to the other model equations so it is observed by other parts of the model?

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:** [12 November 2020 14:49 UTC](https://forum.dynare.org/t/problem-with-estimating-on-empirical-data/16899/22 "2020-11-12T14:49:11Z")

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The error message comes from point 2. If a parameter is not identified, the likelihood will be flat in this direction and the Hessian not positive definite. You can run `identification` to see this.

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