These old articles are good read because shows how thinking advances. Warnings about euroarea turned out to be true.<p>Today the idea of optimal currency area is more known.<p>* <a href="https://www.economist.com/blogs/freeexchange/2013/08/sustainability-single-currency" rel="nofollow">https://www.economist.com/blogs/freeexchange/2013/08/sustain...</a><p>* <a href="https://www.economist.com/blogs/freeexchange/2010/05/optimal_currencies" rel="nofollow">https://www.economist.com/blogs/freeexchange/2010/05/optimal...</a>