The idea that certain economic variables are roughly constant in the long-run is an old one. Kaldor described them as stylized facts, whereas Klein and Kosobud labelled them great ratios. While such ratios are widely adopted in theoretical models in economics as conditions for balanced growth,...

The 1992 Maastricht Treaty, laid the foundations for the current European Union with its single market in goods, services, capital and labour and established the framework for the creation of the single currency. We study countries that differ in the extent to which they share a common currency...