“As a result, world GDP should rise in real PPP-adjusted terms from $72 trillion in 2010 to $380 trillion dollars in 2050,” he wrote.

As the world watches oil prices rise sharply amid unrest in the Middle East, Buiter’s analysis of the world’s long-term prospects offer some hope that better times are ahead but if he is right power will shift from the West to the East very quickly.

“China should overtake the US to become the largest economy in the world by 2020, then be overtaken by India by 2050,” he predicted.