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Computer model of the Banzhaf power index from the Wolfram Demonstrations Project. The Banzhaf power index, named after John Banzhaf (originally invented by Lionel Penrose in 1946 and sometimes called Penrose–Banzhaf index; also known as the Banzhaf–Coleman index after James Samuel Coleman), is a power index defined by the probability of changing an outcome of a vote where voting rights ...
The Marshall-Edgeworth index, credited to Marshall (1887) and Edgeworth (1925), [11] is a weighted relative of current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12]
Lloyd Shapley in 2012. The Shapley value is a solution concept in cooperative game theory.It was named in honor of Lloyd Shapley, who introduced it in 1951 and won the Nobel Memorial Prize in Economic Sciences for it in 2012.
The Shapley–Shubik power index was formulated by Lloyd Shapley and Martin Shubik in 1954 to measure the powers of players in a voting game. [1]The constituents of a voting system, such as legislative bodies, executives, shareholders, individual legislators, and so forth, can be viewed as players in an n-player game.
John Francis Banzhaf III (/ ˈ b æ n z. h ɑː f /; [1] born July 2, 1940) is an American public interest lawyer, legal activist, and law professor at the George Washington University Law School. He is the founder of an antismoking advocacy group, Action on Smoking and Health . [ 2 ]
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Power Index Calculator Computes various indices for (multiple) weighted voting games online. Includes some examples. Systematic investment plan calculator Calculate your project potential returns on your mutual fund investments across various timeframes; Pretty Scale Calculate your attractiveness with pretty scale.
This is justified by the fact that, due to the square root law of Penrose, the a priori voting power (as defined by the Penrose–Banzhaf index) of a member of a voting body is inversely proportional to the square root of its size. Under certain conditions, this allocation achieves equal voting powers for all people represented, independent of ...