 | This article possibly contains original research. (April 2011) |
Professional sports leagues are organized in numerous ways. The two most significant types are one that developed in Europe, characterized by a tiered structure using promotion and relegation in order to determine participation in a hierarchy of leagues or divisions, and a North American originated model characterized by its use of franchises, closed memberships, and minor leagues. Both these systems remain most common in their area of origin, although both systems are used worldwide.