The Columbia Business School-professor, makes the arguments in an updated edition of his book on the credit crunch, Freefall. In the new material, exclusively extracted in the Sunday Telegraph, he reveals his fears.
“The different needs of countries with high trade surpluses, particularly Germany, and those running deficits such as Ireland, Portugal and Greece, meant that the single currency was under intense pressure and may not survive. He suggests that one way to save the euro would be for Germany to leave the eurozone, so allowing the currency to devalue and help struggling countries with exports.
“Countries that share a currency have a fixed exchange rate with each other and thereby give up an important tool of adjustment,as long as there were no shocks, the euro would do fine. The test would come when one or more of the countries faced a downturn.”