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A number of companies have entered living rooms in recent years, emerging with new, granular ways for marketers to understand how people are watching television and, in particular, commercials.

1. Why has the appeal of this information increased?
2. How do they do this?
3. How much do companies spend on TV ads in the U.S. each year?
4. Who are Symphony and TVision?

Maheshwari, S. (2017). For Marketers, TV Sets Are an Invaluable Pair of Eyes. The New York Times, Feb. 25 (Retrievable online at