First, were the regions to be united similar or dissimilar in terms of their economies’ vulnerability to external shocks? The more similar the regions, the more optimal the resulting currency area, because policy responses could be applied uniformly across its entire territory.
关于货币联盟的公认智慧是它们的最优性可以用两个问题来评估。首先，组成联盟的地区的经济在应对极端冲击的脆弱性方面是相同还是不同？越是相同，所组成的货币区越优，因为政策应对措施可以在整个区域内一刀切地使用。