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A Comparative Study of Mixed-Member Electoral Systems

Research Project

Project/Area Number 18K01420
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 06010:Politics-related
Research InstitutionMusashi University

Principal Investigator

Nemoto Kuniaki  武蔵大学, 国際教養学部, 教授 (90647025)

Project Period (FY) 2018-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords選挙 / 議会 / 政党 / 比較政治 / テクスト分析 / 選挙制度
Outline of Final Research Achievements

This study focuses on Mixed-Member Systems (MMS) to clarify why there is a discrepancy between the results originally intended by the designers of political systems and the actual political phenomena. More specifically, this study investigated two questions: (1) while theoretically Duverger's Law predicts that the number of candidates in a single-member system should be 2, why is this not the case in countries that have introduced MMSs (e.g., Japan, Korea, and New Zealand)? (2) While it is theoretically predicted that members elected on single-member districts are more locally oriented and members elected on proportional representation are more party oriented, why is this division of roles not necessarily the case in all MMSs?

Academic Significance and Societal Importance of the Research Achievements

本研究の独自性は,選挙区レベルでデュヴェルジェの法則を阻害・促進する要因として,(1)重複立候補制等,見過ごされがちであったMMS特有の各種制度や,(2)当選後の議員の行動(特に議会における発言)に着目することである.(1)日本の衆議院・ニュージーランド・ドイツ等で採用されている重複立候補制の下では,たとえ小選挙区で敗れても比例代表で選出されうる.そうした比例復活議員は,次の選挙での当選を目指し,あたかも当該小選挙区の現職議員であるかのようにふるまう.(2)本研究では,sentiment analysis(感情分析)を応用し,lexiconを作成して議員の発言を敵対的か友好的か分類した.

Report

(7 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2021 2019 2018 Other

All Int'l Joint Research (2 results) Presentation (3 results) (of which Int'l Joint Research: 3 results) Book (3 results)

  • [Int'l Joint Research] University of Washington/University of Pennsylvania(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Umea University(スウェーデン)

    • Related Report
      2023 Annual Research Report
  • [Presentation] Civility in Parliamentary Politics2019

    • Author(s)
      Kuniaki Nemoto and Pedro Franco
    • Organizer
      Asian Political Methodology Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Incumbency Contamination Effect2018

    • Author(s)
      Kuniaki Nemoto
    • Organizer
      European Political Science Association
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Civility in Parliamentary Politics2018

    • Author(s)
      Kuniaki Nemoto and Pedro Franco
    • Organizer
      American Political Science Association
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Book] Japan Decides 20212023

    • Author(s)
      Pekkanen, R.J., Reed, S.R., Smith, D.M.
    • Total Pages
      400
    • Publisher
      Palgrave Macmillan
    • ISBN
      9783031113239
    • Related Report
      2023 Annual Research Report
  • [Book] The Oxford handbook of Japanese politics2022

    • Author(s)
      Robert J. Pekkanen and Saadia M. Pekkanen
    • Total Pages
      888
    • Publisher
      Oxford University Press
    • ISBN
      9780190050993
    • Related Report
      2020 Research-status Report
  • [Book] Parliamentary Committees in the Policy Process2021

    • Author(s)
      Sven T. Siefken and Hilmar Rommetvedt
    • Total Pages
      400
    • Publisher
      Routledge
    • ISBN
      9780367617882
    • Related Report
      2020 Research-status Report

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Published: 2018-04-23   Modified: 2025-01-30  

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