| http://www.w3.org/ns/prov#value | - 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 in November 2013 - 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
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