Article dans une revue: We study the agency costs of delegated public service provision, focusing on the link between organizational forms and uncertainty at project implementation. We consider a dynamic multitask moral hazard environment where the mapping between effort and performance is ex ante uncertain but new information may arise during operations. Our analysis highlights the costs and benefits that bundling planning and implementation–as under public–private partnerships–can bring in terms of project design and operational costs under various scenarios, possibly allowing for asymmetric information, moral hazard and renegotiation. It also shows that relying on private finance enhances the benefits of bundling only if lenders have enough expertise to assess project risks.