stan said:
What a load of crap. Some people just can't stand the reality that PPM brings - that maybe their stations aren't as valuable (or listened to) as they thought.
The reality is that the sample is not proportional on every stratification value. The whole idea of a panel is that it will mirror in near exact proportion every cell (age, gender, ethnicity, geography, language preference, etc.) in the total market because the respondents do not change every 7 days.
Kabrich has noted the deficiencies in certain cells... the Hispanic female and Hispanic Spanish dominant female cells are even further off.
Panels are not supposed to be "fixed" by weighting. They are supposed to be balanced within a few percent and inherently proportional.
To even get MRC accreditation in Houston, Arbiton used a sample frame procedure (address based) and recruit procedure (half done in home, not by phone) that they use nowhere else for PPM. Even now, they can not get a sample that is the right size in each cell. Instead, they show "great progress" total 6+ and 12+ samples, while the key sales demos are nowhere nearly as "great."
In addition, when you compare the number of days of carriage of the meter to the number of days with listening in a diary, you also see some compliance issues. Don't even get me started on how 80's-pager-ugly the meter is, even with the supposedly "hip" skins and cases. For women, it is a leap of faith to assume the meter can and will always be carried. Radio loses lots of listening due to this... most people don't move while watching metered TV, but radio requires a meter that is much smaller, "cuter" and easier to attach to clothing.
Of course, the PPM means considerable new revenue to Arbitron. And keep in mind that advertisers supported electronic measurement because the data is more timely (faster delivery) and it permits posting... neither which issues have any relationship with the accuracy or lack of same of the system.