For 10 points, name this practice,which is used to select leaders and representatives in a democracy.
One theorem about this practice posited by Duncan Black states that its outcome tends towardthe median. One method of performing this action finds a maximum likelihood sequence by findingthe minimum bubble sort distance, called the Kemeny-Young method, and another method is theBorda Count. No method of doing this can have unrestricted domain, non-dictatorship, independenceof irrelevant alternatives, and Pareto efficiency according to (*) Arrow's impossibility theorem.Variations of it include the single-transferable, instant runoff, and Condorcet method. The number ofpeople participating in any one instance of this process is the turnout. For 10 points, name this practice,which is used to select leaders and representatives in a democracy.
One theorem about this practice posited by Duncan Black states that its outcome tends towardthe median.
voting [accept word forms; accept elections or other reasonable equivalents; accept counting votes]