World Tax 2013 is designed to help tax executives determine who is the most appropriate firm to advise them in a particular jurisdiction.
Tax directors may need to choose a new adviser because, for example, it is a country or territory where their company has not done business before, where they cannot use their usual firm because of a conflict of interest or because they are unhappy with their retained firm and want a change.
The publication has rankings and editorial about the leading firms in 56 jurisdictions as well as details of advisers in more than 20 others. It also includes chapters about technical tax developments in a number of countries.
World Tax 2013 opens with market overviews about tax policy in the Americas, Africa and the Middle East, Asia and Europe.
For the methodology, each firm that was listed in last year's edition, along with the leading firms in the jurisdictions World Tax 2013 was researching for the first time, was given the opportunity to make a submission.
International Tax Review researchers and journalists went on to interview corporate tax directors and advisers by phone, e-mail and face-to-face to compile the tiers of leading firms and write the commentaries. There were more interviews with tax directors than ever before.