为了评估原因，最近牛津大学纳菲尔德学院组织了一次研讨班，讨论的焦点是缺少一个主权实体有能力保护作为一个整体的欧洲经济免受肇始于其他地区的危机的影响。
To assess why, a recent symposium on the subject at Nuffield College, Oxford, focused on the lack of a sovereign authority able to protect the European economy as a whole from contagious crises starting elsewhere.