And the world's most expensive city is...
AP
Tokyo is the world's most expensive city for expatriates - while Karachi, the port city and financial centre of Pakistan, is the cheapest, according to Mercer's latest Cost of Living Survey. Karachi is less than a third as expensive as the Japanese capital.
Somewhat surprisingly, the Angolan capital Luanda is the second-most expensive city in the world for expats to live in. But where are the cheapest places?
