The authority of polity is strongly questioned on the grounds of the dogma of ungovernability. In this context of major upheavals resulting from globalisation, polity, until then the legitimate pilot of societal regulation, is progressively outplayed in favour of a market, the shortcomings of...

Using a database of more than 1,100 firms in the MENA region, this article looks at the determinants of demand for trade credit, particularly access to bank credit, size, age and the quality of the firm's financial structure. We show that the difficulty of gaining acces to bank credit positively...

Researchers in finance very often rely on highly persistent Ñ nearly integrated Ñ explanatory variables to predict returns. This paper proposes to stand up to the usual problem of persistent regressor bias, by detrending the highly auto-correlated predictors. We find that the statistical...

In this paper, we provide exact formulas for the pricing of European options under the risk neutral measure, whereas under the historic measure the data follow two types of models : a GARCH process with Lévy innovations, or a GARCH process with Poisson jumps. This approach aims to take...

Two financial structures are equivalent if, for each given state price, the images of their full payoff matrices of these financial structures are equal. The main consequence of this definition is that, regardless of the standard exchange economy ?, the existence of a financial equilibrium in an...

We consider a stochastic financial exchange economy with a finite date-event tree representing time and uncertainty and a financial structure with possibly long-term assets. We exhibit a sufficient condition under which the set of marketable payoffs depends continuously on the arbitrage free...

This working paper proposes an analysis – from a Marxist point of view – of the relationships between John Maynard Keynes and the economic mainstream of his time (first part), then presents the theoretical elements on the crisis developed by this author (second part), and finally questions,...