UBS survey of most expensive cities in world reveal that six of them are in Europe. - According to the latest survey by the Swiss bank UBS on prices and salaries in the biggest cities in the world, the most expensive cities are mainly in the north of Europe. Six out of ten of the cities in the Top 10 of the most expensive cities in the world are European. This survey has been published by UBS since 1970 and was carried out in 73 of the biggest cities in the world. It is based on a basket of...