PPM Shakes Up the Market
By Lisa Pavia • Oct 28th, 2009 • Category: Advertising ArticlesThere are some exciting changes in how radio ratings are now measured and reported. For more than 40 years diaries have been used to measure radio listening patterns. A new measurement tool called, Portable People Meters (PPM) have now taken the place of diaries. Rather than participants writing down what they heard, PPM records all [...]
