APPENDIX
Good Company Index: Scoring and Sources
In calculating the Good Company Index Scores for the companies represented in this book, we used data from a variety of sources, which are listed at the end. (The most up-to-date information on the Good Company Index can be found at http://www.goodcompanyindex.com.)
In some categories, companies were ranked from high to low into octiles, or eighths, which were used to assign category scores that make up the Good Company Index ratings. For example, a company that falls in the top 12.5 percent (the equivalent of the top one-eighth of the overall distribution) would be in the first, or top, octile. A company that falls between 75 percent and 87.5 percent would be in the second octile, and so on.
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