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The median voter theorem states that "a majority rule voting system will select the outcome most preferred by the median voter". It is associated with public choice economics. The median voter theorem rests on two main assumptions, with several others detailed below. The theorem is assuming that voters can place all alternatives along a one-dimensional political spectrum. It seems plausible that voters could do this if they can clearly place political candidates on a left-to-right continuum, but this is often not the case as each party will have its own policy on each of many different issues. Similarly, in the case of a referendum, the alternatives on offer may cover more than one issue. Second, the theorem assumes that voters' preferences are single-peaked, which means that voters have o

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  • Medianwählertheorem
  • Median voter theorem
  • Théorème de l'électeur médian
  • Teorema dell'elettore mediano
  • Twierdzenie o medianowym wyborcy
  • Medianväljarteorin
  • 中間選民理論
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  • Das Medianwählertheorem besagt, dass sich die Positionen der Parteien letztlich zur Mitte hin angleichen werden. Das dazugehörige Medianwählermodell dient in der (neuen) politischen Ökonomik (ökonomische Theorie der Politik) der Veranschaulichung des Verhaltens von Parteien.
  • Le théorème de l'électeur médian énonce que, si les préférences des agents sont unimodales, la médiane des points préférés par les agents constitue un vainqueur de Condorcet. Typiquement, dans une structure politique unidimensionnelle gauche-droite, le théorème s'applique: l'option centriste bat (avec l'aide des voix de droite) toute option de gauche, et bat (avec les voix de gauche) toute option de droite.
  • Twierdzenie o medianowym wyborcy (także twierdzenie Duncana Blacka o medianowym wyborcy, teoria medianowego wyborcy lub model medianowego wyborcy) - twierdzenie sformułowane w 1948 roku przez i spopularyzowane w opublikowanej w 1957 roku pracy .
  • Medianväljarteorin, även känd som medianväljarhypotesen och medianväljarteoremet, är en välkänd väljarmodell inom statsvetenskapen. Teorin innebär förenklat att partier eller politiker som vill maximera antalet röster bör anta den politik som en typisk väljare föredrar, eller röra sig mot den åsiktsposition som denne har. Teorin ger en förklaring till varför politiken tenderar att röra sig mot mitten av höger-vänster-skalan över tid. Teorin, som bygger på matematiskt-statistiska resonemang, utvecklades i USA och räknas till public choice-skolan och står nära spelteorin.
  • 中間選民理論(又稱為中間選民定理或中間選民模型)是一個理論,用來分析選民投票的行為。該理論模型的假設如下:在多數決的選舉中,所有選民的選擇偏好都可以在座標平面上找到對應的一點,這樣的政策偏好圖(也就是民意分布圖)呈現在座標平面上時大部分會是一個常態分配的鐘形曲線;且所有的選民都只會將他手中的選票投給所提政見與自己的政策偏好最接近的候選人(即單峰偏好 "single-peaked preference"),並沒有雙峰偏好("double-peaked preference")的情形;在一個選舉只有兩個候選人競爭的情況下,候選人要得勝出的方法,就是要得票數;為了獲得更多的票數,候選人所提出的必須更往此圖的中間靠攏。如果雙方候選人為了勝選,皆採用將政見向中間靠攏的策略,在激烈的競爭下,會使得雙方所提出的政見最後都座落於選民政策偏好圖的中點之上,雙方所提的政見並不會有任何的差異,而使得雙方所獲得的票數都會一樣多(各獲得半數選民的票數);倘若候選人所提的政見有任何的偏離,而另外一方未偏離中點時,會導致自己可獲得的票數比對方少而落選。 此理論首先由 於1948年在名為 "On the Rationale of Group Decision-making" 的論文中提出,稍後則因為1957年出版的專書 而為人所熟知。
  • The median voter theorem states that "a majority rule voting system will select the outcome most preferred by the median voter". It is associated with public choice economics. The median voter theorem rests on two main assumptions, with several others detailed below. The theorem is assuming that voters can place all alternatives along a one-dimensional political spectrum. It seems plausible that voters could do this if they can clearly place political candidates on a left-to-right continuum, but this is often not the case as each party will have its own policy on each of many different issues. Similarly, in the case of a referendum, the alternatives on offer may cover more than one issue. Second, the theorem assumes that voters' preferences are single-peaked, which means that voters have o
  • Il teorema dell'elettore mediano, afferma che, in una elezione a maggioranza, se la preferenza degli elettori può essere rappresentata come un punto lungo una sola dimensione, se tutti gli elettori votano in modo deterministico per la politica più vicina a quella da loro preferita e se ci sono solo due politiche fra le quali scegliere, sarà scelta la politica preferita dall'elettore mediano. Questa strategia è un equilibrio di Nash.
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