We revisit the model proposed by Gollier and Muermann (see Gollier, C. and A. Muermann, 2010, Optimal choice and beliefs with exante savoring and ex-post disappointment, Management Sci., 56, 1272-1284, hereafter GM). In GM, for a given lottery, agents form anticipated expected payoffs and the...

We address the problem of a social planner who, as in Weitzman (2001), gathers data on experts' discount rates and wants to infer the socially efficient consumption discount rate. We propose an ‘equilibrium approach' and we analyse the expression and the properties of the resulting...

We study the effects of the presence of a negative stereotype on the formation of self-confidence and on decision-making in achievement-related situations. We take into account not only consumption utility but also psychological utility (ex-ante ego utility and ex-post disappointment/elation)....

We provide a discipline for belief formation through a model of subjective beliefs, in which agents hold incorrect but strategic beliefs. More precisely, we consider beliefs as a strategic variable that agents can choose (consciously or not) in order to maximize their utility at the equilibrium....

Can investors with irrational beliefs be neglected as long as they are rational on average? Does unbiased diagreement lead to trades that cancel out with no consequences on prices, as implicitly assumed by the traditional models? We show in this paper that there is an important impact of...

We provide a discipline for belief formation through a model of subjective beliefs, in which agents hold incorrect but strategic beliefs. More precisely, we consider beliefs as a strategic variable that agents can choose (consciously or not) in order to maximize their utility at the equilibrium....

Can behavioral investors be neglected as long as they are rational on average? We show in this paper that there is an important impact of such investors on the behavior of financial markets, even though the pricing formulas are quot;on averagequot; (over the states of the world) unchanged. In...

In this paper, we show that behavioral features can be obtained at a group level when the individuals of the group are heterogeneous enough. More precisely, starting from a standard model of Pareto optimal allocations, with expected utility maximizers and exponential discounting, but allowing...

The problem of fair pricing of contingent claims is well understood in the contex of an arbitrage free, complete financial market, with perfect information: the so-called arbitrage approach permits to construct a unique valuation operator compatible with observed price processes. In the more...

Our aim is to analyze the link between optimism and risk aversion in a subjective expected utility setting and to estimate the average level of optimism when weighted by risk tolerance. This quantity is of particular importance since it characterizes the consensus belief in risk-taking...