Posted by John Vrooman on Sunday, April 8, 2018 in Sports Econ Theory (In Progress).

National League-American Rival League (Baseball) War 1901-1903

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National Football League-American Football League War (1960-67)

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National Basketball Association-American Basketball Association War (1967-76)

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National Hockey League-World Hockey Association War (1972-79)

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Big 4 Expansion and Franchise Relocation (1995-2016)

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