We define coherent-ambiguity aversion within the Klibano¤, Marinacci and Mukerji (2005) smooth ambiguity model (henceforth KMM) as the combination of choice-ambiguity aversion and value-ambiguity aversion. We analyze theoretically ?ve ambiguous decision tasks, where a subject faces two-stage...

The aim of this paper is to examine the impact of inequalities and economic convergence on the efficient discount rate when international credit and risk-sharing markets are inefficient. We consider an economy in which initial consumption levels and growth expectations are heterogeneous. In the...

In this paper, we examine second-best efficient allocations of risk when some forms of incompleteness are introduced in risk- sharing contracts. In the first model, there are two independent sources of risk, but risk-sharing contracts can be made contingent to only one of the two sources. We...

In the standard portfolio problem, a shift in the distribution of the risky asset is ``portfolio-dominated'' if it reduces the demand for the risky asset by all risk-averse agents, whatever the riskfree rate. We show that the condition obtained by Landsberger and Meilijson [1993] (while...