The proper level of decentralization is difficult to assess because one procurement process that effectively reduces the opportunity for corruption in one government may be ineffective in another local government. Because of the nature of grand corruption, especially in developing countries where it is endemic and nationwide, the central government must have some role in monitoring the performance of local procurement officials. By serving as a procurement watchdog, the national government can guarantee a floor for the provision of services and reserve the prerogative to intervene when required.