A number of authors have attemted to test whether the U.S. economy is in a determinate or an indeterminate equilibrium. We argue that to answer this question, one must be impose a priori restrictions on lag length that cannot be tested. We provide examples of two economic models. Model 1...

We study identiÞcation in a class of three-equation monetary models. We argue that these models are typically not identiÞed. For any given exactly identiffed model, we provide an algorithm that generates a class of equivalent models that have the same reduced form. We use our algorithm to...

The paper analyses the evolution of the trade specialisation pattern in the ten countries which will join the EU in 2004, by studying the dynamics of their comparative advantages over the period 1993-2000. The study finds that, although some countries are still broadly relying on natural...