I'm looking at Arbitron's "PPM Delivery Schedule" PDF on their website: http://arbitron.com/downloads/ppm_delivery_schedule.pdf
As more and more markets move from diaries to PPM, there's one question bugging me that I can't find the answer to.
What is this "2-Month PPM Pre-Currency Period"?
Is it like a testing period and these two months' PPM data would not count? What's the difference between this, and going right into PPM after the final book from diaries?
As more and more markets move from diaries to PPM, there's one question bugging me that I can't find the answer to.
What is this "2-Month PPM Pre-Currency Period"?
Is it like a testing period and these two months' PPM data would not count? What's the difference between this, and going right into PPM after the final book from diaries?