Define monetary union
+ve of single currency
+ve: Eliminates exchange rate risk and uncertainty
+ve: Eliminate transaction costs
+ve: Encourages price transparency
+ve: Low rates of inflation – low i/r, increased I and output
-ve
-ve: Unable to use exchange rates as mechanism of adjustment (-ve)
-ve: Unable to use monetary policy as an econ policy (-ve)
-ve: Monetary policies pursued by central bank has varying effects on diff countries