In a nite-trader version of the Diamond-Dybvig (1983) model, the symmetric, ex-ante e cient allocation is implementable by a direct mechanism (i.e., each trader announces the type of his own ex-post preference) in which truthful revelation is the strictly dominant strategy for each trader. When the model is modi ed by formalizing the sequential-service constraint (cf. Wallace, 1988), the truth-...

When a firm undertakes risky activities, the conflict between social and private incentives to exercise safety care requires public intervention. This control takes the form of both monetary incentives but also monitoring taking place either ex ante or ex post, i.e., before or after an accident occurs. We delineate the respective scopes of these monitoring activities when public monitors are ei...

We propose a new decision criterion under risk in which people extract both utility from anticipatory feelings ex ante and disutility from disappointment ex post. The decision maker chooses his degree of optimism, given that more optimism raises both the utility of ex ante feelings and the risk of disappointment ex post. We characterize the optimal beliefs and the preferences under risk generat...

This paper develops algorithms for dynamically consistent updating of ambiguous beliefs in the maxmin expected utility model of decision making under ambiguity. Dynamic consistency is the requirement that ex-ante contingent choices are respected by updated preferences. Such updating, in this context, implies dependence on the feasible set of payoff vectors available in the problem and/or on an ...

We study the interaction between (a) inefficiencies in the post-default debtor-creditor bargaining game and (b) ex ante debtor moral hazard and excessive lending in sovereign debt markets. Conditional on default, selffulfilling debt crisis driven by creditor coordination failure exists and crisis risk is inefficiently high. Strengthening collective action clauses (CACs) has an ambiguous impact ...

HUMANE SLAUGHTER: THE Ante-Mortem HANDLING Humane slaughter is the technical and scientific proceeding set that guarantees the animal welfare since loading, in the rural property, to the bleeding. The slaughter must be performed without unnecessary suffering. The humane conditions must be presented during preslaughter handling. The animal stunning is considered the most critical operation durin...

Can the Pareto criterion guide policymakers who do not know the true model of the economy? If policymakers specify ex ante preferences for agents, then Pareto improvements from a distorted status quo are usually possible, and with more commodities than states, one can implement almost every Pareto optimum. Unlike the standard second welfare theorem, planners cannot dictate allocations: agents m...

We study random assignment economies with expectedutility agents, each of them eventually obtaining a single object. Inspired on Hylland and Zeckhauser’s (1979) Pseudomarket mechanism (PM) and on a serial dictatorship, we introduce the Sequential Pseudomarket (SP) where groups of agents are called turn by turn and participate in a pseudomarket for the remaining objects. To measure e¢ ciency, we...