The United States tops the overall ranking in The Global Competitiveness Report 2008-2009.
Top five:
US 5.74
Switzerland 5.61
Denmark 5.58
Sweden 5.53
Singapore 5.53
The rankings are calculated from both publicly available data and the Executive Opinion Survey, a comprehensive annual survey conducted by the World Economic Forum together with its network of Partner Institutes (leading research institutes and business organizations) in the countries covered by the report.
[Learn more: World Economic Forum]
