In this thesis we deal with different topics in financial mathematics, that are all related to market imperfections and to the fundamental technique of utility maximization. The work consists of three parts. In the first one, which is based on two papers, we consider the problem of optimal...

In this paper we deal with a utility maximization problem at finite horizon on a continuous-time market with conical (and time varying) constraints (particularly suited to model a currency market with proportional transaction costs). In particular, we extend the results in Campi and Owen (2011)...

This article emphasises that the information provided by term structures of commodity prices has an influence on the real option value and on the investment decision. We exhibit first of all the analysis framework: the evaluation of an oil field. We suppose that a single source of uncertainty -...

La présentation de la théorie du stockage et de la notion de convenience yield permet d’exposer les fondements théoriques des modèles de structure par terme des prix des commodités. Ces derniers peuvent être utilisés pour réaliser des opérations de couverture ou dans le cadre de...

The number of articles on real options arises some questions. Is it possible to employ them in every field? What can we expect of them a valuation method, or a new way of thinking? This text aim to answer to these questions. It gives some precision on the analogy between real and financial...