The term 'common-pool ressource' refers to a natural or man-made resource system that is sufficientl…

Elinor Ostrom — Governing The Commons (Chap 2)

The term 'common-pool ressource' refers to a natural or man-made resource system that is sufficiently large as to make it costly (but not impossible) to exclude potential beneficiaries from obtaining benefits from its use.

— Elinor Ostrom, Governing The Commons, Chap 2