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PPM Presurvey Bulletin,
January 2007, February 2007, and March 2007
PPM Release Schedules and Methodology
Additional information on the release schedule for PPM audience estimates and data, and information on PPM methodology, is available at the Arbitron Web site at:
http://www.arbitron.com/portable_people_meters/home.htm
Note: Although Currency markets (markets converted to PPM measurement) and Demonstration markets (markets providing PPM demonstration data) utilize methodology that is similar in many respects, such markets employ methodological differences with which subscribers may wish to become familiar.
