UK Accounting Glossary
In game theory and economic theory, a zero-sum game is a mathematical representation of a situation in which each participant’s gain or loss of utility is exactly balanced by the losses or gains of the utility of the other participants.
A game in which the sum of the pay-offs to players is zero for every outcome.
In a non-competitive two-player zero-sum game a positive pay-off for one player implies a negative pay-off (of equal value) for the other player.
Zero-sum games represent direct opposition between the interests of the players and examples are often used to method to model conflict.
Poker and gambling are popular examples of zero–sum games since the sum of the amounts won by some players equals the combined losses of the others.
In game theory, the game of “Matching Pennies” is often cited as an example of a zero–sum game.
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This glossary post was last updated: 5th May 2019.