Quote:
Originally Posted by paul_r
there's no way to tell if someone has the radio on 
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Speaking of which, is there even a neilsen-style system for regular radio? How do they figure listenership, especially since a lot of radio is only listened to in the car? Do those 15-minute turn-it-on-until-commercial-before-switching drives to work count once per show, per hour, or what? Mali, you seem to be the most informed one on this thread, have you read this anywhere?