As a research paradigm, collaborative research brings together practitioners and researchers for the purpose of creating knowledge that is relevant to practice and added value to theoretical development. The collaborative effort tends to bridge the rigor–relevance gap. In Kieser and Leiner’s article "Collaborate With Practitioners: But Beware of Collaborative Research," in the Journal of Management Inquiry, the authors challenge the added value of collaborative research to both practice and the scientific outcomes. This rejoinder takes issue with Kieser and Leiner’s key arguments, basic assumptions, narrow and limited points of departure, the view of the essence of social and management science, misunderstanding of managerial work, collaborative research, and action research.