Source: wikibot/shapley-shubik-power-index
= Shapley–Shubik power index
{wiki=Shapley–Shubik_power_index}
The Shapley–Shubik power index is a concept from cooperative game theory that measures the power or influence of individual members in a decision-making body, such as a voting system. Developed independently by Lloyd Shapley and Martin Shubik in the early 1950s, the index quantifies the contribution of each player (or voter) to the success of a coalition of players.