As the use of collaborative, consensus-based decisionmaking procedures increases, so, too, do the obstacles to using these processes. For example, many managers and decision makers are now encountering limits on the participation in such processes by key stakeholder groups. Indeed, perhaps one of the most difficult challenges an agency faces in undertaking a consensus process is in securing participation by appropriate stakeholders. In order to more effectively sponsor and manage collaborative decisionmaking processes, an understanding of the incentives for stakeholder participation is critical. A recent study of negotiated rulemaking at the US Environmental Protection Agency (USEPA) assessed participants' incentives for participation, which revolve around four major themes: (1) resources required for participation, (2) input into final decision and response to comments, (3) use of technical data, and (4) representation and communication issues. Keeping these incentives in mind when initiating a collaborative regulatory process may assist managers and sponsors in ensuring inclusion and participation by key participants.