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Demand function estimation without instruments, identification and estimation of market size and market scope.

Research Project

Project/Area Number 20K01585
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 07030:Economic statistics-related
Research InstitutionHokkaido University

Principal Investigator

Imai Susumu  北海道大学, 公共政策学連携研究部, 教授 (10796494)

Co-Investigator(Kenkyū-buntansha) 鈴木 広人  城西国際大学, 経営情報学部, 准教授 (10434375)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords費用データ / 需要関数 / 費用関数 / 操作変数 / 寡占市場 / 需要関数の推定 / 費用関数の推定 / 構造推定 / 費用のデータ / 市場規模
Outline of Research at the Start

本研究では製品差別化された企業の需要関数と生産関数の新しい推定方法を開発する。従来の研究では、その場合に操作変数の仮定と呼ばれる、需要ショックとそれ以外の幾つかの変数が無相関であるという強い仮定が必要であった。近年、研究代表者はそのような強い仮定が必要とされない推定法を寡占企業の推定に関して提唱したが、その推定法では、市場規模の同時推定が必要であった。本研究では、需要関数と生産関数の一部のパラメータの推定に関しては、操作変数の仮定も市場規模の同時推定も不必要であるような推定方法を開発する。

Outline of Final Research Achievements

When economists investigate the relationship between prices and purchases,they often find that it is positive, or negative but the decrease in consumer purchases when prices rise is small.The reason for the estimated positive relationship is that in many differentiated products markets popular brand charge higher prices.This is different from the relationship between the price and purchase volume of a product, since even if an unpopular brand raises its price,the purchase volume will not increase.In this study, we have developed a method to deal with the above estimation problem in a non-arbitrary manner by using the company's cost data.

Academic Significance and Societal Importance of the Research Achievements

寡占企業の需要関数、費用関数の推定は、その産業の競争状態を計測するために必要であり、よって、健全な競争の促進を目指す産業政策にとっては不可欠であるが、従来の研究では、そのような推定作業は、操作変数に決定的に依存してきた。しかし、多くの場合、その操作変数の妥当性を実証的に保証することは困難である。本研究では、従来別々に推定されてきた需要関数と費用関数を費用のデータを用いて同時に推定をした場合、需要関数の価格係数、費用関数の産出量の係数は、操作変数を用いることなく識別・推定可能であることを理論的に、そしてモンテ・カルロ実験を通じて数値的に示し、また市場規模に関するデータも不要であることを示した。

Report

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

    (16 results)

All 2022 2021 2020 Other

All Int'l Joint Research (9 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Book (1 results) Remarks (2 results)

  • [Int'l Joint Research] City, University of London(英国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] BI University Oslo(ノルウェー)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Univefsity of Melbourne(オーストラリア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Melbourne(オーストラリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] City, University of London(英国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] BI Norwegian Business School(ノルウェー)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] City University London(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Melbourne/Monash University(オーストラリア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Universidad Nacional de Cordoba(チリ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Instrument-free Identification and Estimation of Differentiated Products Models Using Cost Data2022

    • Author(s)
      David P.Byrne, Susumu Imai, Neelam Jain, Vasilis Sarafidis
    • Journal Title

      Journal of Econometrics

      Volume: 228 Issue: 2 Pages: 278-301

    • DOI

      10.1016/j.jeconom.2021.12.006

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Assessing gender gaps in employment andearnings in Africa: The case of Eswatini2021

    • Author(s)
      Zuzana Brixiova Schwidrowski, Susumu Imai, Thierry Kangoye & NadegeDesiree Yameogo
    • Journal Title

      Development Southern Africa

      Volume: 39 Issue: 4 Pages: 643-663

    • DOI

      10.1080/0376835x.2021.1913996

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 寡占市場の均衡化における製品の品質の生産費用に対する影響の識別,推定に関するノート2020

    • Author(s)
      今井, 晋;菊地, 雄太;佐々木, 潔;鈴木, 広人
    • Journal Title

      經濟學研究

      Volume: 70 Pages: 3-11

    • NAID

      120006951997

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Presentation] Estimation of production function with revenue data.2021

    • Author(s)
      Susumu Imai
    • Organizer
      2021 International Association for Applied Econometrics (IAAE) Annual Conference.
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Book] 消費者行動の理論と実証2021

    • Author(s)
      今井 晋
    • Total Pages
      76
    • Publisher
      公益財団法人 三菱経済研究所
    • ISBN
      9784943852810
    • Related Report
      2020 Research-status Report
  • [Remarks] Susumu Imai

    • URL

      https://sites.google.com/site/susumuimai1/home

    • Related Report
      2021 Research-status Report
  • [Remarks]

    • URL

      https://sites.google.com/site/susumuimai1/home

    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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