International organizations play an important role in policy implementation. As member states do not necessarily resolve political disagreements before delegating tasks, this article focuses on how individual member states seek to influence policy implementation by international organizations. It argues that the institutional context in which delegation takes place affects the opportunities for such unilateral influence. Particularly when the agent has considerable autonomy, implementation is likely to be a contested process. The article presents evidence on the implementation of peacebuilding policy by three international organizations in Kosovo after independence in 2008. Despite the fact that the member states within the UN, OSCE and EU fundamentally disagree on the legal status of Kosovo, the organizations have deployed substantial peacebuilding missions. The UN, OSCE and EU have, however, different institutional designs: implementing agents in the UN and OSCE have, by default, more autonomy than those in the EU. We analogously observe variation in how and to what extent member states exert unilateral influence during implementation of peacebuilding policy on the ground in Kosovo.
Policy Implications• Policy implementation by international organizations can be as politically contested as the decision-making by member states. Rather than avoiding the delegation of policy implementation, states should seek to balance between who gains during decision-making and who gains during implementation.• Strong states have a disproportionate amount of influence over policy implementation. Weaker states should focus on the institutional constrains in which such unilateral influence plays out. This is an effective method of setting boundaries.• The stricter collective control mechanisms in international organizations, the less likely individual member states exert unwanted unilateral influence. States should, however, also recognize that strict collective control often comes at the expense of the quality of policy implementation.• The nitty-gritty institutional rules on staffing and budget allocation significantly affect how individual states can influence policy implementation by international organizations. States should be aware that these politics of bureaucratic resourcing can also undermine the quality of policy implementation.