# Mimi.FUND Tax parameters

**URL:** <https://forum.mimiframework.org/t/mimi-fund-tax-parameters/151>\
**Category:** Uncategorized\
**Created:** [February 4, 2021, 8:38pm UTC](https://forum.mimiframework.org/t/mimi-fund-tax-parameters/151 "2021-02-04T20:38:04Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![lguo](https://avatars.discourse-cdn.com/v4/letter/l/4af34b/32.png) [@lguo](https://forum.mimiframework.org/u/lguo)\
**Post date:** [February 4, 2021, 8:38pm UTC](https://forum.mimiframework.org/t/mimi-fund-tax-parameters/151/1 "2021-02-04T20:38:04Z")

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Hi,

I’m new user to Mimi and Julia. This is really a great tool. Thank you all! I have 4 questions about the tax parameters in the FUND model ( [MimiFUND.jl/EmissionsComponent.jl at master · fund-model/MimiFUND.jl · GitHub](https://github.com/fund-model/MimiFUND.jl/blob/master/src/components/EmissionsComponent.jl)).

1. I’m not sure about the meanings of the parameters including `taxpar`, `taxmp`, `currtax`, `taxconstant`, `taxemint`, `taxthreshold`, and `taxdepreciation`. Is there any reference for these parameters and their range?

2. The variable `co2red` I guess is the tau in eq. CO2.2 in the documentation. Is there any reference for its function?

3. The CO2 emission calculation function is involved with `v.seei` and `v.scei`, which seems different from the eq. CO2.1. Is there any reference for this one?

4. I didn’t find the calculation of Cost of emission reduction eq. CO2.7. Is it involved in the package?

Thank you very much!

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**Author:** ![lrennels](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.mimiframework.org/lrennels/32/6_2.png) [@lrennels](https://forum.mimiframework.org/u/lrennels)\
**Post date:** [February 8, 2021, 9:11pm UTC](https://forum.mimiframework.org/t/mimi-fund-tax-parameters/151/2 "2021-02-08T21:11:16Z")

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Hi @lguo we’re so glad you are finding the tool useful! I do not off the top of my head have answers to these questions since I am more of an expert on the Mimi tool as opposed to the individual models that have been constructed on the platform, but I will check in with my more FUND-knowledgeable colleagues to see if they can help out and respond here soon!

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**Author:** ![lguo](https://avatars.discourse-cdn.com/v4/letter/l/4af34b/32.png) [@lguo](https://forum.mimiframework.org/u/lguo)\
**Post date:** [February 9, 2021, 10:36pm UTC](https://forum.mimiframework.org/t/mimi-fund-tax-parameters/151/3 "2021-02-09T22:36:01Z")

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Hi @lrennels, very nice. Thank you!

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**Author:** ![tlorans](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.mimiframework.org/tlorans/32/36_2.png) [@tlorans](https://forum.mimiframework.org/u/tlorans)\
**Post date:** [March 29, 2021, 6:16pm UTC](https://forum.mimiframework.org/t/mimi-fund-tax-parameters/151/4 "2021-03-29T18:16:52Z")

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Hi @Irennels, did you have some more informations about these variables?  
I agree with Iguo, what is done in the code regarding the abatement costs computation through emissions reduction is unclear and and do not correspond to the documentation/paper.

Indeed, for example, it seems there are some steps for the computation of co2red which are not published in the documentation…