But if business integration is reinforced over time, the case for these countries’ incorporation into the EMU will be even stronger.3 And there is always the possibility for these nations to unilaterally adopt the euro as a legal tender, as some small economies have already decided to do.
But it is very important to recognize that, for our southern neighbours, security integration and economic integration are clearly linked. With that, let me return to the question, Where do we go from here? 1  Helliwell, JF 1998. How Much Do National Borders Matter? Washington, DC: The Brookings Institution. 3/6  Let's start with trade.