It's an interesting economic phenomenon, trying to keep your generated economic output of labor local. Always seems to be done by relatively isolated sub-communities (socially or geographically), where, let's call it, artisan shopowners seem to be the beneficiaries. Usually not where there's a whole lot of meaningful industrial activity to begin with...

https://en.wikipedia.org/wiki/Local_currency

https://en.wikipedia.org/wiki/Local_exchange_trading_system

https://en.wikipedia.org/wiki/List_of_community_currencies_i...