Sarnoff's Law states that a broadcast network's value is determined by the number of viewers. It was established by David Sarnoff. For example, a news network could claim its value increased from the previous year if viewers increased from 5,000 to 10,000 based on Sarnoff's Law. Laws related to Sarnoff's Law include Metcalfe's Law, which says a network's value increases as its size increases, and Reed's Law, which states that the utility of large social networks can scale exponentially with network size.