A coordination game is a class of game-theoretic interaction in which players benefit most when they choose compatible strategies, but multiple stable outcomes (Nash equilibria) exist. Unlike the Prisoner's Dilemma, where actors are tempted to defect, in coordination games the central problem is not cheating but selecting among equally cooperative outcomes and credibly signaling which one will be chosen.
Classic textbook variants include:
- Pure coordination (e.g., driving on the left or right): players are indifferent between equilibria as long as they match.
- Battle of the Sexes: both players want to coordinate, but each prefers a different equilibrium, introducing distributional conflict.
- Stag Hunt: players prefer joint cooperation on a high-payoff outcome but face risk if the partner defects to a safer option.
In international relations theory, coordination games are central to regime theory and the study of international institutions. Stephen Krasner and others have argued that many issues in world politics — technical standards, navigation rules, radio spectrum allocation, financial reporting norms — resemble coordination problems rather than collaboration problems. Once a focal point is established, states have little incentive to deviate, which helps explain why institutions like the International Telecommunication Union or the International Civil Aviation Organization persist with relatively weak enforcement mechanisms.
Thomas Schelling's work on focal points (The Strategy of Conflict, 1960) is foundational: in the absence of communication, players gravitate toward salient solutions shaped by culture, precedent, or prominence. This insight underlies analyses of tacit bargaining, arms control verification thresholds, and even crisis management.
Coordination games also illuminate distributional politics within cooperation. As Stephen Krasner argued in Global Communications and National Power (1991), even when all states gain from coordinating, the choice of standard can favor some actors over others, turning ostensibly technical negotiations into power-laden bargaining. This is why standard-setting bodies — from 5G telecom standards to accounting rules — often become arenas of geopolitical competition.
Example
During the 1865 founding of the International Telegraph Union, European states faced a coordination game over signaling codes: all gained from a common standard, but each preferred its own national system be adopted.
Frequently asked questions
In a Prisoner's Dilemma, actors are tempted to defect even when cooperation is mutually beneficial. In a coordination game, no one wants to defect once an equilibrium is chosen — the challenge is agreeing on which equilibrium to adopt.
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