Structure of Economic Networks-Costs, Efficiency, and Pairwise Stability of Link Formation

• Project/Area Number: 21530170
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Economic theory
• Research Institution: Keio University
• Principal Investigator: TAMADA Yasunari 慶應義塾大学, 経済学部, 准教授 (30265938)
• Co-Investigator(Kenkyū-buntansha): KAWAMATA Kunio 帝京大学, 経済学部, 教授 (30051569)
• Co-Investigator(Renkei-kenkyūsha): YAMAGATA Ryuji 東邦大学, 理学部, 准教授
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: ネットワーク / リンク形成 / コネクション / ゲーム理論 / 組織構造 / リンク / プラットフォーム / ネットワーク外部性

Research Abstract

(1) In the article "Effects of Players 'Asymmetry on a Network Formation", we introduce players' asymmetry into the network formation problem. Based on both theoretical and simulation based analyses, we study the effects of concavity and convexity of link value functions on the efficiency and stability of networks.(2) In the article "Delegating the Decision-Making Authority to Terminate a Sequential Project", we considers the optimal allocation of decision-making authority within firm network, when a project requires two-stage sequential investments to be made by different agents.
The optimal structure is determined by whether the stopping opportunity is important or not.

Research Products

• [Journal Article] ネットワーク形成モデルとプレイヤーの非対称性-4プレイヤー直結モデルの場合 (2011)
  • Author(s): 山方竜二
  • Journal Title: 東邦大学教養紀要
• [Journal Article] (2010)
  • Author(s): 川濱昇, 大橋弘, 玉田康成(編)
  • Journal Title: モバイル産業論 -その発展と競争政策-(東京大学出版会) Pages: 105-134
• [Journal Article] (2009)
  • Author(s): 岡田羊祐, 林秀哉(編)
  • Journal Title: 独占禁止法の経済学 -審判決の事例分析-(東京大学出版会) Pages: 213-231
• [Book] ゲーム理論の基礎 (2012)
  • Author(s): 川又邦雄
  • Publisher: 培風館
• [Book] クールノー競争,予算制約とアクセス料金の規制について,市場・動学・経済システム (2011)
  • Author(s): 川又邦雄, 根岸隆・三野和雄
  • Publisher: 日本評論社
• [Book] モバイル産業論 (2010)
  • Author(s): 川濱昇・玉田康成・大橋弘
  • Publisher: 東京大学出版会
• [Book] リベートと私的独占 (2009)
  • Author(s): 玉田康成・垣内晋治
  • Publisher: 東京大学出版会
• [Remarks]
  • URL: http://k-ris.keio.ac.jp/Profiles/0030/0006787/profile.html
• [Remarks]
  • URL: http://k-ris.keio.ac.jp/Profiles/0030/0006787/profile.html