Ines Reiferscheid highlights cross-departmental and cross-company collaboration as important methods of innovation management to increase the market success of new products. She examines the impact of the power dynamics among interacting actors on development outcomes in this context. Based on a literature review, an empirical study on the collaboration between R&D and marketing, as well as a theoretical study on the collaboration between provider and customer companies, is presented. The results of the empirical study—based on a survey of top managers and relevant employees from various industries—illustrate the effect of relative R&D power on product program innovativeness and company success.