Economy - overview:
Internally, the EU has abolished trade barriers, adopted a common currency, and is striving toward convergence of living standards. Internationally, the EU aims to bolster Europe's trade position and its political and economic power. Because of the great differences in per capita income among member states (from $7,000 to $78,000) and historic national animosities, the EU faces difficulties in devising and enforcing common policies. In the wake of the global economic crisis, the European Commission projected that the EU's economy will shrink by 4% in 2009. In September 2009, the Commission reported that the EU was recovering from the crisis faster than it had projected, however, significant risks to sustainable growth remain, including, deteriorating fiscal positions, rising unemployment, tight bank lending, and a strong euro. Even prior to the global economic crisis Germany and France flouted the member states' treaty obligation to prevent their national budgets from running more than a 3% deficit, and now many more member states are running substantial deficits. Between 2004 and 2007, the EU admitted 12 countries that are, in general, less advanced economically than the other 15. Eleven established EU member states introduced the euro as their common currency on 1 January 1999 (Greece did so two years later), but the UK, Sweden, and Denmark chose not to participate. Of the 12 most recent member states, only Slovenia (1 January 2007), Cyprus and Malta (1 January 2008), and Slovakia (1 January 2009) have adopted the euro; the remaining eight are legally required to adopt the currency upon meeting EU's fiscal and monetary convergence criteria.

GDP (purchasing power parity):
$14.52 trillion (2009 est.)