Mercer, a subsidiary of Marsh & McLennan Companies Inc, is a leading global consulting and human resources firm. By virtue of Mercer’s multinational consultancies, it is equipped with "one of the most comprehensive databases on overseas staff transfer policies, wage and salary schemes and a global data on the cost of living, including rent and allowances. The firm has recently released a list of the most expensive cities in the world from the expatriate point of view. Among them are some African cities. But what impact does this have on common Africans?