kirby007 said: NPD=amazon data hmmmm what could this possibly tell us |
Think about Amazon like an electoral research... you don't need to interview all population in a country to make a estimate of who will win with a margin of error.
Amazon give you that.
We just needs to find what is the Amazon margin of error compared with the orveall market... but you can't deny anymore Amazon shows a trend that others retails faced.
Fictional numbers...
Amazon ratio: 2:1
So with the margin of error the others retail can be:
Gamestop: 1.9-2.1:1
Target: 1.8-2.2:1
Warlmart: 2.0-2.2:1
You see? The overall retail sales split between retails is close to what Amazon shows at the end... that's why you can use the Amazon trend to estimate others retails sales and at least to be pretty close to the overall NPD winner.
The margin of erros only will affect the overall winner if the sales are close to each other like 180k vs 190k but while PS4 had a good magin of sales ahead Xbone like 300k vs 250k the amazon margin of error (that we don't know) won't change the overall winner.