non-zero sum game
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non-zero sum gamea situation in GAME THEORY where game players, by choosing appropriate strategies, can collectively increase the total payoff available to all players. For example, by collaborating over their advertising and promotion, two firms may be able to expand the total market for a product so that both are able to increase their sales and profits.
Collins Dictionary of Economics, 4th ed. © C. Pass, B. Lowes, L. Davies 2005