WNTIRadio said:
5 or 6 people DO make a difference if your station doesn't cover the entire metro, that does happen. There are a lot of those in the NYC market. Had it happen. Panel changed and the ratings drastically changed, turned out that's how many people dropped off and messed up the numbers.
But you said "the difference between a 2 and a 3 share" and I demonstrated that a 3 share represents, in NYC, upwards of 200 metered persons... more with lower TSL stations.
5 or 6 meters would make that big a difference in a station with a 0.2 share, not one with a 3 share.
I don't know of any suburban station with a 3 share.
BTW, the panel is always changing... about 8% a month, between early drop-offs, attrition and noncompliance and reaching the maximum of 24 months on the panel.
The thrust of my posts have been not that this is a 100% lock and perfect way to do it, but that someone needs to think outside the box and come up with better ways to skin this cat.
As I said, Arbitron has been working on a cellular implementation for years. So far, the issues I have mentioned, and others, have made it impossible to implement. I'm quite sure they will eventually come up with a system, but job one is making sure that they can have a true proportional panel and, thus, be eligible for MRC accreditation.
The methodology CAN be improved.
You have been talking about technology. That will always improve over time.
As to methodology, the PPM system has made four or five major methodology changes just in the last year: Cell Phone Only sample (CPO), GeoZones, extension of Address Based Recruiting, In Person Recruiting, multi-year averages for Language Preference, etc.
What we will not get is a larger sample. But the addition of GeoZones should make small panel changes in specific small areas fairly transparent.