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Related:

Charter City:

https://en.wikipedia.org/wiki/Charter_city_(economic_develop...

Special Administrative Region:

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

"Special Economic Zones in the United States: From Colonial Charters, to Foreign-Trade Zones, toward USSEZs" (2016 Academic Paper by Tom W. Bell):

https://digitalcommons.law.buffalo.edu/cgi/viewcontent.cgi?a...

"Startup City" (YouTube Query):

https://www.youtube.com/results?search_query=startup+city

ReasonTV: "A private libertarian city in Honduras":

https://www.youtube.com/watch?v=TwiE1dxGYNY

Book: "Free Private Cites" (by Titus Gebel) (2018):

https://www.amazon.com/Free-Private-Cities-Governments-Compe...

Zone for Employment and Economic Development ("Zonas de empleo y desarrollo económico" or "ZEDE"):

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

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