This article is devoted to a survey of results for differential games obtained through Viability Theory. We recall the basic theory for differential games (obtained in the 1990s), but we also give an overview of recent advances in the following areas : games with hard constraints, stochastic...

All Courts rule ex-post, after most economic decisions are sunk. This might generate a time-inconsistency problem. From an ex-ante perspective, Courts will have the (ex-post) temptation to be excessively lenient. This observation is at the root of the principle of stare decisis. Stare decisis...

The cost of equity capital is traditionally considered as an increasing function of the estimation risk – the risk of error regarding the distribution of a firm’s future cash flows (FCF). Under international GAAPs, IAS 36 “Impairment of assets” -based information disclosure conveys...

Two agents sequentially contracts with different principals under moral hazard. If agents care for one another, the second principal gains by insuring them over first wages. Even with independent tasks, the first principal must offer riskier payments to induce effort.

According to economic theory, health insurance raises medical care consumptions by inducing ex-post moral hazard behavior, it is to say the purchase of health care that individual value below their production cost. Nevertheless, among the economists community, some suggest that these additional...

The paper introduces status as re ecting an agent's claim to recognition in her work. It is a scarce resource: increasing an agent's status requires that another agent's status is decreased. Higher status agents are more willing to exert e ort in exchange for money; better-paid agents would...

This paper investigates the impact of health risk on insurance contract with hazard moral. We use a bi-dimensional utility function (wealth and health status). We prove that the type of health risk influences the equilibrium of insurance market. A full coverage is possible with moral hazard....

We study incentive-compatible labour contracts in the case where individual productivity, preference for leisure and time preference rate are unobservable by the principal in a two-period model. We first reduce this three-dimensional problem to a standard one-dimensional screening problem....

The objective of this thesis is to comprehend the behaviour of firms repurchasing their own shares, listed in Paris stock exchange, and liquidity contractors, by examining the impact of their trades on market liquidity and share return. More specifically, the thesis focuses on three elements...