Along time the European Union (EU) has been pointed as the most succeeded example of regional integration. Now, this example has been cruelly shaken by the EZ (Euro Zone) crisis, originating increasing doubts about the integration process. It is evident that the proposed solutions for attacking...

The present study aims to verify whether the balance-of-payments constrained growth approach is suitable for explaining the Portuguese growth performance during the last decades. For that, we adopt "Thirlwall's Law" that predicts actual growth by the ratio of the exports growth relative to the...

Many dynamical systems depend on parameters. One may expect that small variations of the parameters produce no significant changes in the orbits. As was shown in Chap. 3 for the Logistic Map, even in simple cases, there exist critical values such that, moving the parameters through them, the...