Despite the fact that there is a high degree of business cycle synchronization between the new entrants and the EU-15 as well as large intra-industry trade, timing of the entry into the euro zone remains crucial.
尽管欧盟的新成员国和欧盟15国之间的商业周期高度协调一致，工业内部有大宗贸易，但进入欧元区的时间选择仍然是很重要的。