Political Advertising Economics

A Multi-Billion Dollar Industry

In the 2020 US election cycle, total spending on political advertising exceeded $14 billion, nearly double the 2016 figure. Television still commands the largest share, but digital advertising has exploded: from roughly $1.4 billion in 2016 to over $4 billion in 2020. Facebook and Google are the dominant digital platforms, though Google banned political ads in the week before the 2020 election and Facebook has periodically restricted targeting options.

The economics are simple: political campaigns face a deadline (Election Day) and cannot save unused resources for next quarter. This creates a 'use it or lose it' dynamic that drives up prices. In competitive swing states during October, the cost of a 30-second TV spot can increase tenfold as campaigns outbid each other for limited airtime. Local television stations in battleground states like Pennsylvania and Georgia earn windfall profits every two years.

Does Political Advertising Work?

The evidence is surprisingly mixed. A landmark 2012 study by political scientists Alan Gerber, James Gimpel, and others found that television advertising has measurable effects on voter preferences but that these effects decay rapidly, often within days. The implication is that ads matter most in the final weeks before an election and that early advertising is largely wasted money.

Digital micro-targeting, which uses data to serve different messages to different voter segments, was widely credited with Obama's 2012 victory and blamed for Cambridge Analytica's role in the 2016 Trump campaign. But subsequent research has been more skeptical. A massive 2023 study of Facebook political ads found that they had 'no significant effect' on political attitudes or turnout. The gap between the advertising industry's promises and the academic evidence is substantial.

Worked Example: The Georgia Senate Runoffs

The January 2021 Georgia Senate runoffs offer a textbook illustration of the 'use it or lose it' economics of political advertising. Because control of the entire US Senate hinged on two seats, money poured into a single media market on a fixed deadline with no next quarter to save for. The two runoff races drew more than $800 million in combined spending, much of it on television, making them the most expensive Senate contests in history at the time. Ad rates in the Atlanta market spiked as Democrats Jon Ossoff and Raphael Warnock and Republicans David Perdue and Kelly Loeffler bid against each other for the same finite airtime. Ossoff and Warnock both won, flipping the Senate.

The deadline-driven surge is easiest to see in the digital numbers, which have grown far faster than the overall total:

The lesson is not that Georgia's spenders bought their wins, television effects decay within days, but that a hard deadline plus a fixed supply of airtime produces price spikes no rational bidder can avoid.