We estimate that the euro has increased trade within the eurozone by about 26 per cent and trade between the eurozone and outsiders by about 12 per cent on average for the years 2002- 2005 compared to 1995-1998. The percentage increases were smaller for products that were exported every year...

Helpman, Melitz and Rubinstein (2008) derive gravity equations to estimate effects of trade barriers on the intensive and extensive margins of trade. They exploit the frequency of zeros in aggregate bilateral trade data to identify effects on the extensive margin and to obtain controls for firm...