I'm confused by your questions. Each mfg and publisher does internal tracking of its own products via data supplied directly by each retailer for sales and inventories, sometimes on a daily basis if they so choose. Each mfg and publisher can also internally project for competitors, but results are not always accurate. Mfgs and publishers will wait for NPD reporting before making statements on competitors, or how its own products rank in a time period, as NPD data is considered data of record for the market. And of course subscribers get detailed unit, revenue and pricing data on every item ever manufactured on a monthly basis from NPD for those categories they subscribe to.