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A question was asked on a French-speaking Discord server I'm on: Is there any #ScienceFiction work that specifically explores in details fictional alternative economic systems?
@Shelenn Ayres Thank you for the elaborate answer! The question arose because in many popular science-fiction universes (including Star Wars, Asimov and Dune), either the economic system is eluded (often for a generic market economy similar to ours), or the little we learn about it generates more questions about its actual viability than it answers.
Kim Stanley Robinson's Red/Green/Blue Mars series introduces a collective with a gift economy, but they're not central.

Daniel Abraham's Dragon and the Coin series (outstanding) revolves around bankers, but throughout the events of the book they develop fairly standard economic ideas of fiat currency and exchange rates. Quite well done, though.

Dave Duncan's Reluctant Swordsman series has a bit about how trade works in a non-literate society that can't sign contracts.