Under the Globalization Hypothesis for in ‡ation, as globalization increases, global economic slack should progressively replace the domestic gap in driving in ‡ation. In order to assess the empirical support for this theoretical prediction, we use impulse response functions of in ‡ation to domestic and foreign output gap shocks from a TV-VAR model estimated for eighteen countries. The main results of the analysis are twofold: First, the structural results show that global slack a¤ects the dynamics of in ‡ation in many countries, yet these e¤ects do not get stronger over time. Second, a panel analysis that exploits the cross-section characteristics of the response functions shows that globalization, measured in terms of openness and business cycles integration, is positively related to the e¤ects of global slack on in ‡ation. The degree of openness of a country and its economic integration into the global economy are complementary rather than overlaid forces.JEL Classi…cation: E31, F02, F41