drkohler on 28 December 2013
| ioi said: Their data scaling is nowhere near as sophisticated as you seem to think - they pretty much take the 60% of data they they get directly from the retail partners and multiply it by 1.66 to estimate for the whole market. |
I have no idea how NPD works, having only met a very few GfK statisticians. So I simply replaced GfK with NPD in my arguments. If NPD really works as you seem to have experienced, that would not shed a good light (unless you unluckily met "doormen type" people..)
