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Farmers' investment behavior in "quality": A case of shrimp aquaculture industry

Research Project

Project/Area Number 19KK0331
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))

Allocation TypeMulti-year Fund
Review Section Basic Section 07040:Economic policy-related
Research InstitutionThe University of Tokyo

Principal Investigator

Suzuki Aya  東京大学, 大学院新領域創成科学研究科, 教授 (20537138)

Project Period (FY) 2020 – 2023
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥14,300,000 (Direct Cost: ¥11,000,000、Indirect Cost: ¥3,300,000)
Keywordsエビ養殖 / 可視化 / 水質 / 外部性 / ベトナム / 質への投資 / シグナリング / 情報の非対称性
Outline of Research at the Start

本研究は、質が混在する途上国の高付加価値農水産物の市場において、農家の質への投資行動を考察する。事例として、ベトナムのエビ養殖産業を取り上げる。同産業では、国際的に禁止されている抗生剤を農家が使用したり、投入財にそれらが元々混入されていることが問題となっているが、農家が他の農家のエビと区別するためにどのようにシグナリングを行うかを考察する。具体的には、農家の使用した稚エビ、投入財や養殖方法を登録できるウェブサイトを構築し、エビを購入する輸出業者にも閲覧可能とする。どのような農家がそのサイトに登録しシグナリングを行うのか、また参加後の養殖方法の変化や収益への影響、周囲への波及効果等を研究する。

Outline of Final Research Achievements

This study examined the growing global aquaculture industry and how we can improve the frequent disease outbreaks that have long been a challenge in the industry and the behavior of farmers to use antibiotics to prevent and cope with these outbreaks. To examine which farmers would be willing to invest in the shrimp quality by visualizing water quality, we conducted an experiment using a water quality measurement device which is linked to apps that stores water chemistry parameters. Further, we quantitatively visualized agricultural externalities transmitted to the aquaculture ponds via waterways and peer effects whereby the behavior of neighboring farmers also affected their own behavior, showing that their own behavior and characteristics as well as the disease outbreaks and adoption of good practices by neighboring farmers affected the results in their own aquaculture ponds.

Academic Significance and Societal Importance of the Research Achievements

本研究は、どのような農家が質への投資を行うのかを8か月間にわたる頻繁な水質データを入手して考察する点に特徴がある。養殖農家、現地の関連団体、水質計とアプリを開発したインドネシアの企業他との連携無しでは実施できず、またその結果は直接的に同産業に政策含意をもたらす。さらに、エビ養殖を対象に養殖池レベルのデータを用いて、農業外部性が農家のプラクティスや病気発生に与えるメカニズムを実証した既往研究はなく、学術的貢献となる。

Report

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

    (17 results)

All 2023 2022 2021 2020

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 11 results,  Invited: 8 results) Book (1 results)

  • [Int'l Joint Research] University of Waikato(ニュージーランド)2020

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Reducing antibiotics use among smallholders: Experimental evidence from the shrimp aquaculture sector in Vietnam2023

    • Author(s)
      Suzuki Aya、Nam Vu Hoang、Lee Guenwoo
    • Journal Title

      Aquaculture

      Volume: 572 Pages: 739478-739478

    • DOI

      10.1016/j.aquaculture.2023.739478

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The effects of disease outbreaks on shrimp aquaculture and the role of cooperatives in the Mekong Delta2021

    • Author(s)
      Nguyen, T.T.H. and A. Suzuki.
    • Journal Title

      Journal of International Economics and Management

      Volume: 21 Pages: 91-108

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Shrimp Supply Chain at a Crossroads?: Quality, Disease Externalities, and Market Structure2023

    • Author(s)
      Suzuki, Aya
    • Organizer
      Asian Economic Development Conference 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Can Online Communities of Practice Complement or Substitute the Conventional Agricultural Extension Services?: Evidence from a Facebook Group of Shrimp Farmers2023

    • Author(s)
      Lee, Guenwoo
    • Organizer
      Asian Economic Development Conference 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 東南アジアのエビ養殖:現状と課題2023

    • Author(s)
      鈴木綾
    • Organizer
      東大水フォーラム公開シンポジウム
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Blue Revolution in Asia: The Rise of the Shrimp Sector in Vietnam and the Challenges of Disease Control2023

    • Author(s)
      Suzuki, A.
    • Organizer
      Festschrift Workshop for Keijiro Otsuka
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Fish Farming in Asia: Why the Sector Deserves More Attention from Economists2023

    • Author(s)
      Suzuki, A.
    • Organizer
      11th Conference of the Asian Society of Agricultural Economists
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Can online communities of practice complement or substitute the conventional agricultural extension services?: Evidence from a Facebook group of shrimp farmers2023

    • Author(s)
      Lee, G.
    • Organizer
      11th Conference of the Asian Society of Agricultural Economists
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Physical Spillovers or Peer Effects? Determinants of Disease Outbreak in Shrimp Farming in Vietnam2022

    • Author(s)
      Suzuki, A.
    • Organizer
      4th Conference of the Japanese Association for Development Economics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Physical Spillovers or Peer Effects? Determinants of Disease Outbreak in Shrimp Farming in Vietnam2022

    • Author(s)
      Suzuki, A., Susan Olivia, Vu Hoang Nam, and Guenwoo Lee
    • Organizer
      4th Conference of the Japanese Association for Development Economics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Rising Importance of Aquaculture in Asia: Current Status, Issues, and Recommendations2021

    • Author(s)
      Suzuki, A.
    • Organizer
      10th Asian Society of Agricultural Economists International Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rising Importance of Aquaculture in Asia: Current Status, Issues, and Recommendations2021

    • Author(s)
      Suzuki, A.
    • Organizer
      ADBI-ADB-VNUA Workshop on Building Sustainable and Resilient Agriculture in Asia and the Pacific Amid New Challenges
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Inducing Smallholders’ Compliance with International Standards: Evidence from the Shrimp Aquaculture Sector in Vietnam2021

    • Author(s)
      Suzuki, A., Vu Hoang Nam, and Guenwoo Lee.
    • Organizer
      International Conference of Agricultural Economists 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Rising Importance of Aquaculture in Asia: Current Status, Issues, and Recommendations2021

    • Author(s)
      Suzuki, A.
    • Organizer
      Virtual Workshop on Asian Development Outlook 2021 Update: Deepening Diversity in Asian Agriculture
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Rising Importance of Aquaculture in Asia: Current Status, Issues, and Recommendations2021

    • Author(s)
      Aya Suzuki
    • Organizer
      Virtual Workshop on Asian Development Outlook 2021 Update: Deepening Diversity in Asian Agriculture
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] "Blue Revolution in Asia: The Rise of the Shrimp Sector in Vietnam and the Challenges of Disease Control" in Agricultural Development in Asia and Africa2022

    • Author(s)
      Suzuki, A. and V.H. Nam
    • Total Pages
      14
    • Publisher
      Springer
    • Related Report
      2022 Research-status Report

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Published: 2020-02-06   Modified: 2025-01-30  

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