Efforts to make the rules more flexible are a welcome development, but shortcomings remain, particularly given that implementation risks make the macroeconomic effects of rule changes difficult to quantify. For example, it is not obvious how to deal with the fact that decisions by large countries have larger externalities, both positive and negative, than those made by their smaller peers, setting the ground for different treatment in a monetary union of supposed equals.
让规则更加灵活的措施值得欢迎，但缺陷仍在，特别是考虑到实施风险让规则变化的宏观经济效果难以量化。比如，如何应对大国的决定比小国具有更大（积极和消极）外部性的事实，为本应平等的货币联盟中的区别对待找到依据，目前尚不清楚。同样不清楚的还有欧盟委员会被授予多大的自由裁量权纠正这类结果。