A financial stability fund set by a union of sovereign countries (e.g. the European Stability Mechanism), can improve countries's ability to borrow and lend, and to share risks, with respect to debt financing. Efficiency gains arise from the ability of the fund to offer long-term financial...

In the typical model of risk sharing with limited commitment (e.g. Kocherlakota, 1996) agents do not have access to any technology transferring resources intertemporally. In our model, agents have a private (non-contractible and/or non-observable) saving technology. We first show that, under...