http://www.rbr.com/ ©2007 Spoonlabs d.o.o. Vivvo CMS 4.1 2012-02-12T02:52:41-06:00 http://www.rbr.com/radio/radio_ratings/ppm_question_is_it_programming_or_panelists.html 2008-05-06T10:46:00-05:00 2008-05-06T10:46:00-05:00 RBR/TVBR Two monthly client calls ago Arbitron had Radio One Houston Market Manager Doug Abernethy explain how his Urban cluster dealt with the change to Portable