Does UN system coordination work? The UN system includes a multitude of independent agencies, programs, and funds. The system-wide coherence initiative and the system-wide action on climate change were both intended to result in efficient collaboration. Details are provided on efforts to improve coherence at the country level through “Delivering asOne,” harmonize business practices, consolidate the UN architecture on gender issues, and streamline international environment governance. The Chief Executive Board (CEB) in its role as the coordinating mechanism for system-wide action is described, in particular the “One UN” support for the negotiations process to agree on a post-Kyoto climate deal. It is
argued that the systemic barriers to UN system coordination are considerable. Agreements, if any, are reached at the lowest common denominator and result in considerable transaction costs. Rather than coordination, it appears the consolidation and merging of the fragmented UN mandates and structures is a precondition for efficient action.