Dozens of people worked together to produce Casablanca. But a single person working alone wrote Ulysses. While almost all films are produced by large collaborations, no great novel ever resulted from the work of a team. Why does the frequency and success of collaborative creative production vary across art forms? The answer lies at the intersection of intellectual property law and the theory of the firm. Existing analyses in this area often focus on patent law and look almost exclusively to property-rights theories of the firm. The implications of organizational theory for collaborative creativity and its intersection with copyright law have been less examined. To fill this gap, we look to team-production and moral-hazard theories to unders...