Our findings complement those in Hope et al. (2006), who focus on a cross-sectional analysis of country-level determinants of IFRS adoption. The time-series data on IFRS adoptions that have become available since their study allow us to test the dynamic hypothesis that the worldwide proliferation of IFRS is due in part to network effects. Our evidence has significant implications for the worldwide prospects of IFRS-as more countries adopt IFRS, it becomes more move costly for smaller countries to remain outside of the IFRS network.