Nielsen

For decades, every television ad in America was priced on one number, the Nielsen rating. A show with a 10 rating meant 10% of households watched. Advertisers paid more for higher ratings. The entire TV advertising industry, worth 70 billion annually, ran on measurements from boxes in roughly 40,000 homes. 40,000 families determined how 70 billion was allocated. The methodology was sound. The business model was unassailable. No competitor could replicate the panel because Nielsen had exclusive network contracts and four decades of historical data. The measurement was the market. If Nielsen did not measure it, it did not exist commercially. Revenue exceeded 3.5 billion in 2023.