# Lightning Fees - inbound vs outbound

**URL:** <https://delvingbitcoin.org/t/lightning-fees-inbound-vs-outbound/29>\
**Category:** Economics\
**Created:** [January 10, 2023, 11:40am UTC](https://delvingbitcoin.org/t/lightning-fees-inbound-vs-outbound/29 "2023-01-10T11:40:43Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![renepickhardt](https://delvingbitcoin.org/user_avatar/delvingbitcoin.org/renepickhardt/32/7_2.png) [@renepickhardt](https://delvingbitcoin.org/u/renepickhardt)\
**Post date:** [January 10, 2023, 12:23pm UTC](https://delvingbitcoin.org/t/lightning-fees-inbound-vs-outbound/29/2 "2023-01-10T12:23:21Z")

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Before going deeper into the discussion, can you please elaborate the motivation to use a linear function Q(f) = a - b\cdot f to model the fee / demand function?

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_[View the full topic](https://delvingbitcoin.org/t/lightning-fees-inbound-vs-outbound/29)._