Highlights :

 Abstract :
We improve the study of the effects of a Currency Union on trade. Using data on French exports at the firm level, we compute an intensive and extensive margins of French exports - with a variety dimension - over the period 1998-2003. Estimation results indicate that nominal exchange rate volatility has a negative effect, which translates into the intensive and extensive margins. We also provide some evidence that the euro had an additional positive effect on the extensive margin; this effect is not related to the reduced nominal exchange rate volatility. This suggests a new varieties effect of the euro.

 Keywords : Trade | Export margins | Euro

 JEL : F10, F15