Exchange Rate Misalignments, Fiscal Federalism and Redistribution: How to Adjust in a Monetary Union

The euro zone crisis illustrates the insufficiency of adjustment mechanisms in a monetary union characterized by a large heterogeneity. Exchange rate adjustments being impossible, they are very few alternative mechanisms. This situation reflects a simple diagnosis. At the level of the whole euro zone, the euro is close to its equilibrium parity. But the euro is strongly overvalued for Southern European countries, France included, and largely undervalued for Northern European countries, especially Germany. In a first step, the paper gives an evaluation of these exchange rate misalignments inside the euro zone, using a FEER approach. Using panel econometric techniques over the period 1994-2011, we confirm that the exchange rate misalignments in the euro zone have diverged, reflecting unsustainable evolutions. Last, we give an estimation of the equivalent transfers in % of GDP implied by these misalignments in the different European countries. In a second step, we use a 'stock-flow consistent' model of a monetary union with two countries along the lines of Godley and Lavoie (2007) and Duwicquet and Mazier (2010). A federal budget is introduced with federal expenditures and social transfers financed by federal taxes and euro-bonds issuing. Three results are obtained. The stabilizing role of such a federal budget is confirmed facing asymmetric shock or the negative impact of exchange rate misalignments inside the monetary union. Without such a federal mechanism the overvaluation of the Southern currency (Greek or Spanish euro), facing the undervaluation of the Northern currency (German euro), induces a strong slowdown in the South and a cumulative imbalances within the monetary union. Similarly, the stabilizing role of euro-bonds used to finance European investment projects is illustrated. Their role in the pooling of national debts would be the last point to examine.