# eps shrinkage

**URL:** <https://forum.certara.com/t/eps-shrinkage/2329>\
**Category:** Modelling and Simulation\
**Created:** [October 17, 2011, 5:07pm UTC](https://forum.certara.com/t/eps-shrinkage/2329 "2011-10-17T17:07:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dora\_teo](https://avatars.discourse-cdn.com/v4/letter/d/7ea924/32.png) [@dora\_teo](https://forum.certara.com/u/dora_teo)\
**Post date:** [October 17, 2011, 5:07pm UTC](https://forum.certara.com/t/eps-shrinkage/2329/1 "2011-10-17T17:07:30Z")

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Hello, I have a question regarding eps shrinkage. I am working on a poppk project in which I have separate eps for the observations in two matrices. When I look in “core status” output file, only one eps shrinkage value is reported. Is this correct? Shouldn’t I have a separate shrinkage value for each eps in my model? If this is correct, I can easily calculate separate shrinkages outside of Phoenix environment. But, please confirm. I am wondering if this is because the residuals from all observations (regardless of the matrix) are reported in the same “residuals” worksheet. Thank you, Dora