Arnold Chassagnon

Comparative risk aversion: A formal approach with applications to saving behavior

We consider a formal approach to comparative risk aversion and apply it to intertemporal choice models. This allows us to ask whether standard classes of utility functions, such as those inspired by Kihlstrom and Mirman (1974) [16], Selden (1978) [27], Epstein and Zin (1989) [10] and Quiggin (1982) [25] are well ordered in terms of risk aversion. Moreover, opting for this model-free approach allows us to establish new general results on the impact of risk aversion on savings behaviors. In particular, we show that risk aversion enhances precautionary savings, clarifying the link that exists between the notions of prudence and risk aversion.

A Positive Value of Information for a Non-Bayesian Decision-Maker

In the multi-prior framework, we consider that there exist two sorts of information process: revision information and focusing information. The second one is standard in economics while the former cannot be defined when there is only one prior. In this paper, we provide a coherent defmition of “revising” information structure. We show that we get a positive value of information. A partial order for those revision information structures is also proposed.

On the Role of Menus in Sequential Contracting: A Multiple Lending Example

We study a capital market in which multiple lenders sequentially attempt at financing a single borrower under moral hazard. We show that restricting lenders to post take-it-or-leave-it offers involves a severe loss of generality: none of the equilibrium outcomes arising in this scenario survives if lenders offer menus of contracts. This result challenges the approach followed in standard models of multiple lending. From a theoretical perspective, we offer new insights on equilibrium robustness in sequential common agency games.

Multiple Lenders, Strategic Default and Covenants

We study competition in capital markets subject to moral hazard when investors cannot prevent side trading. Perfect competition is impeded by entrepreneurs’ threat to borrow excessively from multiple lenders and to shirk. As a consequence, investors earn positive rents at equilibrium. We then analyze how investors’ ability to design financial contracts with covenants deals with this counterparty externality. We show that enlarging investors’ contracting opportunities generates a severe market failure: with covenants, market equilibria are indeterminate and Pareto ranked. Market outcomes are then determined by designing specific financial institutions. Information sharing systems restore efficiency but leave a positive rent to investors. A mechanism of investors-financed subsidies to entrepreneurs mitigates the threat of default and sustains the competitive allocation.