kitler53 said:
VGChartz MethodologyData-Collection MethodologyAll sales estimates on VGChartz are arrived at via a number of proprietrary and ever-developing methods:
All data is regularly checked against manufacturer shipments and data released publicly from other tracking firms to ensure accuracy. VGChartz holds no responsibility for the use of our data – any business decisions made are made at your own risk. |
bold - This sounds pretty much like direct sales data from real retailers.
This I got from the NPD site:
The estimates are published in NPD’s report, Games Market Dynamics: U.S. (formerly known as the Games Industry: Total Consumer Spend) –released by The NPD Group quarterly - and are derived leveraging NPD’s portfolio of physical POS tracking (Retail Tracking Service) and consumer research including the Games Acquisition Monitor, Video Game and PC Game Subscriptions Report and Consumer Tracking Service. It also incorporates consumer spend estimation provided by NPD retail and publisher partners, and calibration with third-party sources.
It sounds a lot fancier but ultimately the same to me.
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