We present a model where the enforcement of international risk sharing contracts is costly. With non diversifiable enforcement costs, welfare is not necessarily maximized for perfect worldwide risk sharing. Some groupings, or “pools” of countries can deliver higher welfare, with higher diversification gains net of enforcement costs. We construct an exhaustive list of such pools of countries. Fo...

This paper studies the effects of resource pooling on system performance in the presence of failures. The goal is to understand whether pooling increases efficiency and/or reduces risk. We consider four queueing systems with different degrees of pooling (one has no pooling, one has only queues pooled, one has queues and failures pooled, and one has servers pooled), estimate efficiency via the m...

there are fragmentations in iran’s health insurance system. multiple health insurance funds exist, without adequate provisions for transfer or redistribution of cross subsidy among them. multiple risk pools, including several private secondary insurance schemes, have resulted in a tiered health insurance system with inequitable benefit packages for different segments of the population. also fra...

Using data from a field experiment conducted in seventy Colombian municipalities, we investigate who pools risk with whom when risk pooling arrangements are not formally enforced. We explore the roles played by risk attitudes and network connections both theoretically and empirically. We find that pairs of participants who share a bond of friendship or kinship are more likely to (1) join the sa...

Pooling is the health system function whereby collected health revenues are transferred to purchasing organisations. Pooling ensures that the risk related to financing health interventions is borne by all the members of the pool and not by each contributor individually. Its main purpose is to share the financial risk associated with health interventions for which there is uncertain need. The pu...