According to the study, Oslo is the most expensive city to live in. 
Munich has the second highest wages in Germany, topped by Frankfurt. Berlin has the third highest wages, but the study forgot to mention the fact there's no work to be found in Berlin. The wages taken for the index are based on 14 different professions.
Berlin wins as having the best domestic purchasing power (working time required to buy one BigMac). Your HartzIV money goes a long way here. Frankfurt takes the second position, Munich only the third position.
There's a .pdf file you can download on the page with the full summary of the report, including all the tables.
QUOTE
Four European cities and Tokyo most expensive - highest wages in Scandinavia, Switzerland and the US
Oslo, London, Copenhagen, Zurich and Tokyo are the world’s most expensive cities.
With the highest net wages, Zurich and Geneva, followed by Dublin, Los Angeles and Luxembourg, lead the pack in purchasing power.
People in Asia work the longest hours – almost 50 days more per year than Western Europeans.
Asian workers at least partially compensate for low purchasing power through longer working hours.
Oslo, London, Copenhagen, Zurich and Tokyo are the world’s most expensive cities in relation to a standardized basket of 122 goods and services. The UBS study "Prices and Earnings" shows that life is particularly expensive in London and New York if the cost of housing is included. The basket of goods and services costs the least in Kuala Lumpur, Mumbai, Delhi and Buenos Aires.
Oslo, London, Copenhagen, Zurich and Tokyo are the world’s most expensive cities.
With the highest net wages, Zurich and Geneva, followed by Dublin, Los Angeles and Luxembourg, lead the pack in purchasing power.
People in Asia work the longest hours – almost 50 days more per year than Western Europeans.
Asian workers at least partially compensate for low purchasing power through longer working hours.
Oslo, London, Copenhagen, Zurich and Tokyo are the world’s most expensive cities in relation to a standardized basket of 122 goods and services. The UBS study "Prices and Earnings" shows that life is particularly expensive in London and New York if the cost of housing is included. The basket of goods and services costs the least in Kuala Lumpur, Mumbai, Delhi and Buenos Aires.
