The following documents are available in PDF format, and you will need the Adobe Acrobat Reader to view them. To obtain the Adobe Acrobat Reader Plug-In, click on the Adobe icon:   Research Director, Inc. Announces Comprehensive Ratings Study That Establishes PPM Benchmarks (PDF) — November 2011 (2 pages/152k) Research Director, Inc. Promotes Frank Stanitski to Vice President of Operations (PDF) — April 2011 (1 page/119k) The P1 Effect…How First Preference Listeners Drive Ratings in a PPM World (PDF) — June 2010 (2 pages/53k) Introducing Instant Answer for PPM Version 2.0! — April 2009 (1 page/52k) PPM Proves That Radio Is Strong Throughout the Day — April 2009 (18 pages/242k)