Prisoner's Dilemma – Definition & Examples
Definition: A game theory scenario where two players pursuing their individual best interest produces a worse outcome than if they cooperated.
Detailed Explanation
In the classic setup, two prisoners each face a choice: confess (betray partner) or stay silent (cooperate). Individual incentives push both toward betrayal, but mutual betrayal is worse for both than mutual silence. This models many economic situations: price wars, arms races, environmental degradation—wherever individual rationality leads to collective harm.
Real-World Example
Airlines might both benefit from keeping prices high, but each has incentive to undercut. Both cutting prices leaves everyone worse off—a prisoner's dilemma. OPEC members face similar temptation to exceed quotas.
AP Economics Relevance
The prisoner's dilemma is the foundational game theory concept on AP Micro. You'll identify Nash equilibria and dominant strategies.
Category: Game Theory
How this guide is built
EconArena pairs each definition with exam relevance, a real-world example, a quick diagnostic, and related games or tools so students can move from reading the concept to practicing it.
Practice Prisoner's Dilemma with Prisoner's Dilemma
How to Remember It
A game theory scenario where two players pursuing their individual best interest produces a worse outcome than if they cooperated. A useful definition should do more than name the concept. Try to describe Prisoner's Dilemma – Definition & Examples in your own words, give one real-world example, and name one situation where confusing it with a related term would lead to the wrong answer. That habit is especially helpful for AP, IB, and introductory college economics.
Where It Shows Up
This term can appear in graphs, multiple-choice questions, short-answer explanations, and everyday economic news. Use the linked practice pages and games to see how the idea behaves when assumptions change, incentives shift, or a policy choice affects consumers, firms, workers, or governments.