A conspicuous feature of the modern economy is the multitude of multiunit systems that operate in several markets - an organizational form that arguably rivals the M-form as the 20th century's most successful. Research traditions studying multiunit systems include the multimarket perspective, which has used commitment and mutual forbearance theory, and the multiunit perspective, which has used learning and knowledge transfer theory. These perspectives are interdisciplinary, but to date there has been little direct interaction among them. This text aims to bring these areas together,...