Researcher Profile and Settings

URL

http://www1.doshisha.ac.jp/~tmomi/

researchmap

https://researchmap.jp/read0200870

Research Areas

• Humanities & social sciences / Theoretical economics

Education

• The University of Tokyo, 経済学研究科, 経済理論専攻, - 2000
• The University of Tokyo, Graduate School, Division of Economics, - 2000
• The University of Tokyo, 経済学研究科, 経済理論専攻, - 1997
• The University of Tokyo, Graduate School, Division of Economics, - 1997
• The University of Tokyo, Faculty of Economics, Department of Economics, - 1995
• The University of Tokyo, Faculty of Economics, - 1995

Degree

• Doctor of Economics, The University of Tokyo
• Master of Economics, The University of Tokyo

Published Papers

• Locally efficient and strategy-proof allocation mechanisms in exchange economies
  Takeshi Momi
  Review of Economic Design, Springer Science and Business Media LLC, 27(4) 791 - 824, Dec. 2023, Scientific journal
  

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• Efficient and strategy-proof allocation mechanisms in many-agent economies
  Takeshi Momi
  Social Choice and Welfare, Springer Science and Business Media {LLC}, 55(2) 325 - 367, Aug. 2020, Scientific journal
  

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• Efficient and strategy-proof allocation mechanisms in economies with many goods
  Takeshi Momi
  THEORETICAL ECONOMICS, 12(3) 1267 - 1306, Sep. 2017, Scientific journal
  

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• Note on social choice allocation in exchange economies with Cobb-Douglas preferences.
  Takeshi Momi
  Social Choice and Welfare, 40(3) 787 - 792, 2013, Scientific journal
  

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• Note on social choice allocation in exchange economies with many agents.
  Takeshi Momi
  Journal of Economic Theory, 148(3) 1237 - 1254, 2013, Scientific journal
  

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• Failure of the index theorem in an incomplete market economy
  Takeshi Momi
  JOURNAL OF MATHEMATICAL ECONOMICS, 48(6) 437 - 444, Dec. 2012, Scientific journal
  

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• Note on social choice allocation in exchange economies with many agents
  Takeshi Momi
  Working paper of Faculty of Economics, Doshisha University, 46, 2011
• Note on social choice allocation in exchange economies with Cobb-Douglas preferences
  Takeshi Momi
  Working paper of Faculty of Economics, Doshisha University, 45, 2011
• Excess demand function around critical prices in incomplete markets
  Takeshi Momi
  JOURNAL OF MATHEMATICAL ECONOMICS, 46(3) 293 - 302, May 2010, Scientific journal
  

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• Excess demand functions when new assets are introduced
  Takeshi Momi
  JOURNAL OF ECONOMIC THEORY, 144(4) 1832 - 1843, Jul. 2009, Scientific journal
  

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• Note on the non-existence of sunspot equilibrium
  Takeshi Momi
  ECONOMIC THEORY, 36(3) 503 - 513, Sep. 2008, Scientific journal
  

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• Indeterminacy of rational expectations equilibria in sequential financial markets
  P Donati; T Momi
  JOURNAL OF MATHEMATICAL ECONOMICS, 39(7) 743 - 762, Sep. 2003, Scientific journal
  

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• The index theorem for a GEI economy when the degree of incompleteness is even
  T Momi
  JOURNAL OF MATHEMATICAL ECONOMICS, 39(3-4) 273 - 297, Jun. 2003, Scientific journal
  

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• Excess demand functions with incomplete markets - a global result.
  Takeshi Momi
  Journal of Economic Theory, 111(2) 240 - 250, 2003, Scientific journal
  

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• Excess demand functions with incomplete market---a global result
  Takeshi Momi
  I.E.W Working Paper, University of Zurich, (96), 2002
• Non-existence of equilibrium in an incomplete stock market economy
  T Momi
  JOURNAL OF MATHEMATICAL ECONOMICS, 35(1) 41 - 70, Feb. 2001, Scientific journal

Research Projects

• メカニズムデザインにおける偏微分方程式アプローチ
  茂見 岳志
  論文 Locally efficient and strategy-proof allocation mechanisms in exchange economies（投稿中）で、消費者の選好を任意の選好の近傍に局所的に限定した場合の財配分メカニズムを分析し、そのように限定した場合であっても、財の数が消費者数より多い場合には、パレート最適かつ耐戦略的な財配分メカニズムは独裁的（誰かがすべての財を受け取るが受け取り手は変化しうるという、いわゆる代替的独裁）なものしかないことを示した。同様の結果はこれまでの研究では大域的に得られており、当論文はそれを強化するものである。 一方、当研究課題の主目的は選好の「タイプ」を限定した場合の財配分メカニズムを偏微分方程式を用いて分析することである。こちらについては、研究開始以来、最適かつ耐戦略的で、「独裁的でない」配分メカニズム、すなわち、複数の消費者が財を分け合うような配分メカニズムが局所的には存在するという既存研究を転換する予想を持って研究を進めてきたが、今年度の研究の結果、その様に限定したとしても、最適・耐戦略的・非独裁的な配分メカニズムは存在しないという逆の予想、つまり既存研究を支持する予想を持つに至った。 具体的には以下の結果を得た。コブダグラス型の選好を持つ３人の消費者からなる経済において、配分メカニズムはそれらの選好を定めるパラメータ空間を定義域とする関数となるが、解析的な関数で、最適かつ耐戦略的なものは独裁的なものしかない。つまり、解析的な関数で表現できるものに限れば、そのような経済で最適かつ耐戦略的な財配分メカニズムは独裁である。, 日本学術振興会, 科学研究費助成事業, 2020/04 -2025/03, 基盤研究(C), 同志社大学
• Social choice theory: partial differential equation approach
  Momi Takeshi
  It has long been an open question whether any Pareto-efficienct and strategy-proof allocation mechanisms are dictatorial in economies with many agents while the dictatorship result in two-agent economies is well known. This is what I tried to clarify in this research. I showed that any Pareto-efficient and strategy-proof allocation mechanisms are alternately dictatorial. This result implies that Pareto efficiency and strategy-proofness are incompatible properties of allocation mechanisms even in many-agent economies., Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, 2014/04 -2020/03, Grant-in-Aid for Scientific Research (C), Doshisha University
• Social Choice Theory
  Competitive research funding
• general equilibrium theory in incomplate market model
  Competitive research funding
• 社会的選択理論の研究
  Competitive research funding
• 不完備市場モデルの一般均衡分析
  Competitive research funding