The economic zone which has not yet qualified at all, there is still hope. Because of the use of money.As a result, the same currency participating countries adjust rules to itself, also referred to as endogenous OCA by single currency will help increase the trade volume, which is the very thing that transmission mechanism is compounded the economy (or shocks) to another country (for example, when the economic recession is simple. If there are no exchange rate helps to balance the country's trading partners, exports have been sluggish, the economy is less and less accordingly.) Make the country's economy in the group is more in the same direction.
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