The market portfolio efficiency remains controversial. This paper develops a new test of portfolio mean-variance efficiency relying on the realistic assumption that all assets are risky. The test is based on the vertical distance of a portfolio from the efficient frontier. Monte Carlo...

This paper investigates the links between price returns for 25 commodities and stocks over the period from January 2001 to November 2011, by paying a particular attention to energy raw materials. Relying on the dynamic conditional correlation (DCC) GARCH methodology, we show that the...

We exploit French customs’ firm-level data to study how exporters pass a change in the VAT rate of one importing country through their prices. Looking at this reaction is of interest beyond a mere fiscal incidence analysis: VAT shocks provide instruments to identifying the extent of mark-up...

Économie très largement ouverte, intégrée, située au centre de l’Europe, la France entre en concurrence directe avec ses voisins aussi bien en termes de marchés qu’en termes d’attractivité. Il lui est impossible aujourd’hui de réfléchir à son système fiscal sans prendre en...

We study how French exporters react to a VAT shock in a destination country. As VAT shocks are by nature almost permanent, exogenous, and without impact on marginal costs, the subsequent price reaction makes it possible to identify a pure demand-led mark-up adjustment. The results of an analysis...