Recently, a new resolve for both increased economic integration and monetary and exchange rate cooperation has started to emerge in ASEAN, especially since the 1997-1998 Asian financial crisis. According to the optimum currency area theory, the degree of trade integration is one most important criterion for joining a currency union. The large increase in intra-ASEAN trade in recent years naturally raises the question of whether the ASEAN countries are becoming better prepared to form a currency union. This paper sets to test whether the recorded increase in intra-ASEAN trade is leading the ASEAN members to closer economic integration and thus to better satisfy the criteria for a common currency. Two separate models are estimated for that purpose. First, a variation of the model of Frankel and Rose (1997) was estimated for the ASEAN members. As the results were not very significant, a new methodology that uses the whole sample period data instead of dividing the data into sub-periods was conducted. The results with our own model were very significant and robust when four of the ASEAN5 countries were considered, and showed a clear positive correlation between intra-industry trade and business cycle synchronization in ASEAN. This result has important implications for the prospects of the creation of a common currency in the region.

This paper investigates, for the first time, the degree of exchange rate pass-through to domestic prices in all five founding members of ASEAN. For this purpose, a three variable recursive VAR model was applied which uses the Choleski decomposition method along the distribution chain of pricing, using data for the period 1968 to 2001. The results show that a strong case for entering a currency union can only be made for the cases of Singapore and Malaysia as in these countries there appears to be a case of exchange rate disconnect. A case for a common currency can also be made for Indonesia but for entirely different reasons. For this country, an independent monetary policy is a clear source of shocks to the economy and therefore a currency union would tend to eliminate then. A weaker case for a common currency can be made for the Philippines as evidence of some exchange rate pass-through to inflation was found but not to import prices. Finally, Thailand exhibits a clear case of exchange rate passthrough to import prices (but not to inflation) and thus evidence that a flexible exchange rate might be preferable as it provides the means to improve the country s price competitiveness.

This paper aims to investigate whether structural shocks among ASEAN countries are becoming more symmetrical over time, thus indicating whether this region is becoming better prepared to introduce a common monetary policy. For that purpose a dynamic space-state model that complements the conventional Structural VAR models used in the existing literature was estimated by using the Kalman filter so that the evolution of the degree of shock symmetry and, therefore, the evolution in the degree of convergence could be identified over time, distinguishing between a country's convergence with a regional partner and a more general trend of convergence with the rest of the world.The results showed that in the majority of cases there has been an increase in the degree of convergence of demand shocks in recent years. More importantly, it also showed an increase in divergence in supply shocks for most cases since the beginning of the 90's even when taking into account the Asian Financial Crisis. This is especially true for the periphery countries suggesting that the Philippines and Thailand are not only not converging but actually diverging from the core group. These results have important implications for the prospects of the creation of a common monetary policy in the region.