This working paper gathers two texts. The first one evokes the personality and work of Jules Dupuit, whose famous 1844's contribution is generally viewed as the founding piece of public cost benefit analysis. The second paper presents the content of the opening conference of the "Journ ées de...

In this paper we analyse the impact of product market competition and ownership structure on corporate performance. We focus on the firms listed on the Warsaw Stock Exchange, which are either privatised or newly created firms. First, we study the separate effects of competition and ownership...