In social choice theory, a dictatorship mechanism is a rule by which, among all possible alternatives, the results of voting mirror a single pre-determined person's preferences, without consideration of the other voters. Dictatorship by itself is not considered a good mechanism in practice, but it is theoretically important: by Arrow's impossibility theorem, when there are at least three alternatives, dictatorship is the only ranked voting electoral system that satisfies unrestricted domain, Pareto efficiency, and independence of irrelevant alternatives. Similarly, by Gibbard's theorem, when there are at least three alternatives, dictatorship is the only strategyproof rule.
Non-dictatorship is a property of more common voting rules, in which the results are influenced by the preferences of all individuals. This property is satisfied if there is no single voter i with the individual preference order P, such that P is always the societal ("winning") preference order. In other words, the preferences of individual i should not always prevail. Anonymous voting systems (with at least two voters) automatically satisfy the non-dictatorship property.
The dictatorship rule has variants that are useful in practice: serial dictatorship, random dictatorship, and random serial dictatorship (see below).
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In social choice theory, a dictatorshipmechanism is a rule by which, among all possible alternatives, the results of voting mirror a single pre-determined...
A dictatorship is an autocratic form of government which is characterized by a leader, or a group of leaders, who hold governmental powers with few to...
Random serial dictatorship, also called random priority, can refer to: A general rule for social choice - a variant of the dictatorshipmechanism. A specific...
used for a dictatorship conserving some of the liberties and mechanisms of democracy. The pun is that, in Spanish, dictadura is "dictatorship", dura is...
The military dictatorship in Brazil (Portuguese: ditadura militar), occasionally referred to as the Fifth Brazilian Republic, was established on 1 April...
if all candidates received the same number of votes. Sortition Dictatorshipmechanism Maximal lotteries Sewell, Roger; MacKay, David; McLean, Iain (January...
same problem, such as the probabilistic-serial rule. The page on dictatorshipmechanism describes RSD is a general rule for social choice - not necessarily...
Reorganización Nacional, often simply el Proceso, "the Process") was the military dictatorship that ruled Argentina from 1976 to 1983, which received support from the...
1945. While it nominally used a presidential system, it was in effect a dictatorship where the president controlled all branches of government. A true presidential...
Party not only to achieve the [class] dictatorship; it needs it still more to maintain the [class] dictatorship." The current Constitution of Vietnam...
strong impossibility results imply that the only truthful mechanism is the dictatorshipmechanism (see Gibbard–Satterthwaite theorem). A useful domain restriction...
civil repressive agents members of a secret police, during the military dictatorship of Chile under General Augusto Pinochet from 1973 to 1990. According...
economy with a vanguardist one-party state that aimed to realize the dictatorship of the proletariat. The Soviet Union's ideological commitment to achieving...
it is computationally-hard to find the exact probabilities (see Dictatorshipmechanism#Computation). In the conditional utilitarian rule, each agent receives...
2015. Rome: 4. 2015. "Philippines: The Forest and Landscape Restoration Mechanism". Food and Agriculture Organization of the United Nations. Retrieved 2023-01-13...
against dictatorships. But a dictatorship may be a necessary system for a transitional period. [...] Personally I prefer a liberal dictatorship to democratic...
citizen" to inconspicuous coercion and indoctrination by algorithmic mechanisms, and, less insidiously, to the persuasion of particular candidates based...
constitution describes China's system of government as a people's democratic dictatorship. The CCP has also used other terms to officially describe China's system...
of public consultation, technical consulting bodies, and other similar mechanisms help to improve rationality of decisions before voting on them. Judicial...
ruler, known as an autocrat. It includes most forms of monarchy and dictatorship, while it is contrasted with democracy and feudalism. Various definitions...
is a means by which organizational policies are enforced, as well as a mechanism for determining policy. In many countries, the government has a kind of...
are of electoral colleges used by democracies or dictatorships that were replaced by other mechanisms of election like direct elections during periods...
career—abrupt shifts in alliances and ideologies, but also his eventual dictatorship, similar to European fascism.[citation needed] Between 1930 and 1934...
testament to the thousands of 'disappearance' victims since the Marcos dictatorship, whose long-suffering families are still searching for justice." The...
restraints nor regular mechanisms of popular control (except perhaps for implicit threat). That entity may be an individual, as in a dictatorship or it may be a...
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