Regional policy aims to improve economic conditions in regions of relative disadvantage, either within a nation or within a supranational grouping such as the European Union. Regional policy aims to improve economic conditions in regions of relative disadvantage, either within a nation or within a supranational grouping such as the European Union. Although the European Union is one of the richest parts of the world, there are large internal disparities of income and opportunity between its regions. The May 2004 Enlargement, followed by accession of Bulgaria and Romania in January 2007, has widened these gaps. Regional policy transfers resources from richer to poorer regions.