abstract:Professional sports leagues are organized in numerous ways. The two most significant types are one that developed in Europe, characterised by a tiered structure using promotion and relegation to determine participation in a hierarchy of leagues or divisions and a North American originated model characterized by its use of franchises and closed membership.
Inmodernsportsindustry, professionalleagueis a kind ofindustrialorganizationform, which has the highestcompetitivelevel, the mostadvancedmanagement level, and the largestintegratedvalue.