- This paper examines the suitability of the proposed monetary union among the members of the Gulf Cooperation Council (GCC). To do so, we identify the underlying structural shocks that these economies are subject to and assess the extent to which the shocks are symmetric. Additionally, we test for common trends and common business cycles among the GCC economies. We find that while the transitory demand shocks areare typically symmetric, the permanent supply shocks are asymmetric. Furthermore, we do not find synchronous long-run and short-rum movements in output. Despite the progress that has been made in terms of integration, our findings indicate thet the conditions for forming a GCC monetary union have not as yet been met.