The 2008 survey is regarded as the most comprehensive conducted on this subject to date. In addition to the Global Fortune 250, the sample also included the 100 largest companies by revenue, in 22 countries. The survey presents historical data where possible, drawing from 5 previous surveys conducted by KPMG firms since 1993. Only information available in the public domain was used for this survey, such as company websites, corporate responsibility reports and annual reports issued in 2007-2008.
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