Arbitron's switch to PPM still major issue for radio
Although Arbitron's Portable People Meter ratings system in its current form has been panned as inaccurate by many stations, the metric has won support from some media buyers who believe it eventually will set the new measurement standard for buying and selling radio ads. Arbitron isn't saying much publicly about PPM's alleged problems, but the company has offered to meet with top station groups to address their concerns. Adweek (11/26)