What Form of Government for the European Union and the Eurozone?

What is the form of government of the European Union (EU)? And how is the institutional governance of the Eurozone evolving? These questions have become pressing during the last few years. On the one hand, the Euro-crisis and the legal and institutional responses to it have had major implications on the constitutional architecture of the EU and the Eurozone. On the other hand, the May 2014 electio...