Interesting book and some audio at www.radiocommercial.nl. A book and audience research by the STER, the body that collects advertising for use on Dutch public radio and TV. It seems the radio commercial has the least esteem in the ears of the Dutch public, which is why the STER is trying to get those in the ad business to be more creative. The problem is that no-one makes a car radio that can record anything, so most people resort to a repetitive shout to get their message across.