The shrinking endogeneity of optimum currency areas criteria: evidence from the European Monetary Union - A Beta Regression Approach

The endogeneity of optimum currency areas criteria has been widely studied since Frankel and Rose (1998) seminal paper. Literature normally suggests that there is a positive relationship between trade and business cycles correlation. This paper develops work on this subject (Silvestre and Mendonça, 2007) where we confirm this hypothesis in euro area countries and UE-15 for 1967-2003 period using OLS and 2SLS estimates. However, we also find then that trade influence on cycles synchronization diminished in the last years. Now our goal was precisely to evaluate this question. Using a non-linear model based on Beta distribution in the same sample, we concluded that trade has a decreasing marginal effect on business cycles correlation. This result shows that trade flows are important in the first stages of economic integration, but become less important as trade intensity increases. Other factors must then be considered