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Message: [QUOTE="Scooch, post: 5288728, member: 628"] At a really broad level, there's basically 2 major methodologies in TV measurement these days. Nielsen largely employs a panel method. They have about 40,000 homes with Nielsen TV metering technology installed. That data is cleaned and weighted to represent the U.S. population. Other measurement firms (including mine) employ a big data method. They measure viewing on millions of smart TV sets via a process called Automated Content Recognition. Now, that data also has to be cleaned and weighted represent the U.S. population, but its coming from millions of more inputs than a panel. Both my firm and Nielsen include what's called "out of home" viewing in their audience projections. We do it very differently, however. [/QUOTE]