But many other single-currency areas, including the US, display similar divergence. It should also be obvious that, in the absence of currency markets to act as a “valve” for economic and financial pressures, economic volatility may increase.
从内部而言，衡量欧元区的“成功”的最佳指标是经济增长。许多评论家援引欧元区各成员国之间经济增长率参差不齐的现象作为失败的佐证。但在许多包括美国在内的其它的单一货币区，也显现出同样的分野现象。同样明显的是在没有货币市场作为宣泄经济和金融压力的“阀门”的情况下，经济的不稳定性可能增加。