Openness to trade and the potency of monetary policy:: How strong is the relationship?

Economic theory suggests that an economy's openness to international trade reduces the ability of monetary policy to affect output. Using quarterly data from the 1960:1-1993:4 period for a set of eight countries (Australia, Canada, Germany, Italy, Japan, South Africa, the U.K., and the U.S.A.), this article's empirical results support this theoretical prediction: the more open the economy, the smaller the output effects of a given change in the money supply. This finding, robust across all the different specifications and estimation methods examined, has straightforward implications for stabilization policy. Moreover, it suggests that an economy's net benefit from joining a monetary union is increasing with the economy's openness to foreign trade.