The artificial common reference currency unit used in the European Union to express the volume of economic aggregates for the purpose of spatial comparisons in such a way that price level differences between Member States are eliminated.

• Regulation (EC) NO 1445/2007 of the European Parliament and of the Council of 11 December 2007 establishing common rules for the provision of basic information on Purchasing Power Parities and for their calculation and dissemination
  Place of publication: (Dz. Urz. UE L 336 z 20.12.2007, str. 1, z późn. zm.)