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Econometric Analyses for the Evaluation of Medical Treatments

Research Project

Project/Area Number 17530162
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Economic statistics
Research InstitutionThe University of Tokyo

Principal Investigator

NAWATA Kazumitsu  The University of Tokyo, University of Tokyo/Graduate School of Engineering, Professor (00218067)

Co-Investigator(Kenkyū-buntansha) HARA Hisayuki  University of Tokyo, Graduate School of Engineering, Assistant Professor (40312988)
Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,670,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsLength of Hospital Stay / Effectiveness of Treatment / Hip Fracture / Diagnosis Related Groups(DRG) / Cataract / Discrete Variable / Qualitative Data / Limited Dependent Variable / 計数データ / 診療報酬 / 病院間格差 / 同時方程式モデル / 離散データ / 比例ハザードモデル
Research Abstract

In this research project, we developed econometric models and analyzed the Japanese medical data. First, we evaluate the length of hospital stay and effectiveness of treatment using data of patients hospitalized for hip fractures. Hip factures are important problems. In Japan, the number of hip fracture patients has been increasing rapidly with the aging of the population. Hip fractures are one of the major reasons for the elderly to be bedridden. The influence of the Revision of the Medical Service Fee Schedule in April, 2002, is evaluated in the studies. We also analyze factors which may affect the length of hospital stay and effectiveness of treatment. Newly developed econometric models and computer programs were used in the analysis.
Secondly, the length of hospital stay was analyzed using data pertaining to patients hospitalized for cataract (Diagnosis Related Groups (DRG) 2041) in Japan. The length of hospital stay is analyzed using data pertaining to patients that have been hospi … More talized for cataract by the econometric models. Next, we performed theoretical analyses of methodology to handle the medical data. The length of stay is a discrete-type variable representing positive integers and the effectiveness of treatment is a qualitative variable. Moreover, they are simultaneously determined. Therefore, new methods are required. We performed the theoretical analyses for these data as qualitative, discrete and limited dependent variables. We developed new econometric models and their estimation methods.
Finally, we applied the developed models and methods to the employment adjustment behavior of Japanese firms. A popular hypothesis about the large Japanese firms' employment adjustment is that the labor input is not adjusted by lay-offs but is adjusted by working hours, however, the number of employees is rapidly reduced in deficit periods. We tested the hypothesis and evaluated the structural change on the employment behavior of large Japanese firms from the middle of 1990s.
We believe that these studies provided significant contributions to the fields of econometrics, statistics, health economics and labor economics. Less

Report

(4 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (55 results)

All 2008 2007 2006 2005 Other

All Journal Article (27 results) (of which Peer Reviewed: 11 results) Presentation (21 results) Book (7 results)

  • [Journal Article] Conditions for swappability of records in a microdata set when some marginals are fixed2007

    • Author(s)
      Takemura, A. and Hara, H.
    • Journal Title

      Computational Statistics Vol.22

      Pages: 173-185

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] A Monte Carlo Analysis of the Type II Tobit Maximum Likelihood Estimator When the True Model is the Type I Tobit Model2007

    • Author(s)
      Nawata, K.
    • Journal Title

      Economics Bulletin Vol.3,No.54

      Pages: 1-10

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Improving on the Maximum Likelihood Estimators of the Means in Poisson Decomposable Graphical Models2007

    • Author(s)
      Hara H. and A. Takemura
    • Journal Title

      Journal of Multivariate Analysis Vol.98

      Pages: 410-434

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] A Monte Carlo Analysis of the Type II Tobit Maximum Likelihood Estimator When the True Model is the Type I Tobit Model2007

    • Author(s)
      Nawata, K.
    • Journal Title

      Economics Bulletin Vol.3, No.54

      Pages: 1-10

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Improving on the Maximum Likelihood Estimators of the means in Poisson Decomposable Graphical Models2007

    • Author(s)
      Hara, H. and Takemura, A.
    • Journal Title

      Journal of Multivariate Analysis Vol.98

      Pages: 410-434

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Improving on the maximum likelihood estimators of the means in Poisson decomposable graphical models2007

    • Author(s)
      Hara H. and A. Takemura
    • Journal Title

      Mathematics and Computers in Simulation Vol.98

      Pages: 410-434

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Monte Carlo Analysis of the Type II Tobit Maximum Likelihood Estimator When the True Model is the Type I Tobit Model2007

    • Author(s)
      Nawata, K
    • Journal Title

      Economics Bulletin Vol.3,No.54

      Pages: 1-10

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improving on the maximun likelihood estimators of the means in Poisson decomposable graphical models2007

    • Author(s)
      Hara, H, A. Takemura
    • Journal Title

      Journal of Multivariat Analysis Vol.98

      Pages: 410-434

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 眼科手術における在院日数の離散型比例ハザード・モデルによる分析2006

    • Author(s)
      縄田和満, 石黒彩, 井伊雅子, 川渕孝一
    • Journal Title

      医療経済研究 Vol.18,No.1

      Pages: 41-56

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] 同時方程式モデルによる大腿骨頚部骨折の入院日数と治療成果の分析2006

    • Author(s)
      縄田和満, 渡邉園子, 新田章子, 川渕孝一
    • Journal Title

      日本統計学会誌 Vol.35,No.2

      Pages: 125-142

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] 水晶体の単眼・両眼手術における在院日数の分析2006

    • Author(s)
      縄田和満, 井伊雅子, 石黒彩, 川渕孝一
    • Journal Title

      医療と社会 Vol.16,No.2

      Pages: 167-181

    • NAID

      10019367451

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2006 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An Analysis of the Length of Stay and the Effectiveness of Treatment for Hip Fractured Patients in Japan: Evaluation of the Revision of the 2002 Medical Service Fee Schedule2006

    • Author(s)
      Nawata, K., A. Nitta, S. Watanabe, and K. Kawabuchi
    • Journal Title

      Journal of Health Economics Vol.25,No.4

      Pages: 722-739

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Simultaneous Estimation of the Means in Some Poisson Log Linear Models2006

    • Author(s)
      Hara, H. and Takemura, A.
    • Journal Title

      Journal of the Japan Statishical Society Vol.36,No.1

      Pages: 17-36

    • NAID

      110004740736

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] "An Analysis of the Length of Stay at the Hospital for Cataract Patients in Japan"(In Japanese with English abstract)2006

    • Author(s)
      Nawata, K., M. Ii, A. Ishiguro and K. Kawabuchi
    • Journal Title

      Japanese Journal of Health Economics and Policy Vol.18, No.1

      Pages: 41-56

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] "Evaluation of Hip Facture Treatments by the Simultaneous Equation Model"(In Japanese with English abstract)2006

    • Author(s)
      Nawata, K., A. Nitta, S. Watanabe, and K. Kawabuchi
    • Journal Title

      Journal of the Japan Statistical Society Vol.35, No.2

      Pages: 125-142

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] "An Analysis of the Length of Stays at the Hospital for Cataract Patients of One-Eye and Two-Eye Surgeries in Japan"(In Japanese with English abstract)2006

    • Author(s)
      Nawata, K., M. Ii, A. Ishiguro and K. Kawabuchi
    • Journal Title

      Journal of Health Care and Society Vol.16, No.2

      Pages: 167-181

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] An Analysis of the Length of Stay and the Effectiveness of Treatment for Hip Fractured Patients in Japan : Evaluation of the Revision of the 2002 Medical Service Fee Schedule2006

    • Author(s)
      Nawata, K., A. Nitta, S. Watanabe, and K. Kawabuchi
    • Journal Title

      Journal of Health Economics Vol.25, No.4

      Pages: 722-739

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Simultaneous Estimation of the Means in Some Poisson Log Linear Models2006

    • Author(s)
      Hara, H. and Takemura, A.
    • Journal Title

      Journal of the Japan Statistical Society Vol.36, No.1

      Pages: 17-36

    • NAID

      110004740736

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] 眼科手術における在院日数の離散型比例ハザード・モデルによる分析2006

    • Author(s)
      縄田和満, 石黒彩, 井伊雅子, 川渕他孝一
    • Journal Title

      医療経済研究 Vol.18,No.1

      Pages: 41-56

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 同時方程式モデルによる大腿骨頚部骨折の入院日数と治療成果の分析2006

    • Author(s)
      縄田和満, 渡邊園子, 新田章子, 岩渕孝一
    • Journal Title

      日本統計学会誌 Vol.35,No.2

      Pages: 125-142

    • Related Report
      2006 Annual Research Report
  • [Journal Article] An Analysis of the Length of Stay and the Effectiveness of Treatment for Hip Fractured Patients in Japan : Evaluation of the Revision of the 2002 Medical Service Fee Schedule2006

    • Author(s)
      Nawata, K, A.Niita, S.Watanabe, K.Kawabuchi
    • Journal Title

      Journal of Health Economics Vol.25,No.4

      Pages: 722-739

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Simultaneous Estimation of the Means in Some Poisson Log linear Models2006

    • Author(s)
      Hara, H, A. Takemura
    • Journal Title

      Journal of the Japan Statistical Society Vol.36,No.1

      Pages: 17-36

    • NAID

      110004740736

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 同時方程式モデルによる大腿骨頚部骨折の入院日数と治療成果の分析2006

    • Author(s)
      縄田和満, 渡邉園子, 新田章子, 川渕孝一
    • Journal Title

      日本統計学会誌

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Analysis of the Length of Stay and the Effectiveness of Treatment for Hip Fractured Patients in Japan : Evaluation of the Revision of the 2002 Medical Service Fee Schedule2006

    • Author(s)
      Nawata K., A.Niita, S.Watanabe, K.Kawabuchi
    • Journal Title

      Journal of Health Economics

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 眼科手術における在院日数の離散型比例ハザード・モデルによる分析2006

    • Author(s)
      縄田和満, 石黒彩, 井伊雅子, 川渕孝一
    • Journal Title

      医療経済研究

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 離散型比例ハザードモデル・順序プロビット・モデルによる大腿骨頚部骨折における在院日数と退院時歩行能力の分析2005

    • Author(s)
      縄田和満, 渡邉園子, 新田章子, 川渕孝一
    • Journal Title

      医療と社会 Vol.14,No.4

      Pages: 99-116

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2005 Annual Research Report
    • Peer Reviewed
  • [Journal Article] "Evaluation of Transcervical Fracture Treatments by the Proportional Hazard and Ordered Probit Models"(In Japanese with English abstract)2005

    • Author(s)
      Nawata, K., A. Nitta, S. Watanabe, and K. Kawabuchi
    • Journal Title

      Journal of Health Care and Society Vol.14, No.4

      Pages: 99-116

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] An Analysis of the Length of Hospital Stay for Cataract Patients in Japan2008

    • Author(s)
      Nawata, K.
    • Organizer
      International Congress on Modeling and Simulation
    • Place of Presentation
      Christchurch, New Zealand
    • Year and Date
      2008-12-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] An Analysis of the Length of Hospital Stay for Cataract Patients in Japan2007

    • Author(s)
      Nawata, K.
    • Organizer
      International Congress on Modeling and Simulation
    • Place of Presentation
      Christchurch, New Zealan
    • Year and Date
      2007-12-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] 離散型の比例ハザード・モデルおいてベースライン・ハザード関数に観測されない不均-性が存在する場合の検出方法について-眼科手術における入院日数の分析-2007

    • Author(s)
      縄田和満
    • Organizer
      日本経済学会秋季大会
    • Place of Presentation
      東京
    • Year and Date
      2007-09-23
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 離散型の比例ハザード・モデルおいてベースライン・ハザード関数に観測されない不均-性が存在する場合の検出方法について-眼科手術における入院日数の分析-2007

    • Author(s)
      縄田和満
    • Organizer
      日本経済学会秋季大会
    • Place of Presentation
      日本大学(東京)
    • Year and Date
      2007-09-22
    • Related Report
      2007 Annual Research Report
  • [Presentation] 標本数2のファイバーの構造と分解可能モデルのマルコフ基底2007

    • Author(s)
      原 尚幸
    • Organizer
      統計関連学会連合大会
    • Place of Presentation
      神戸
    • Year and Date
      2007-09-08
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] "Structures of Fibers in the Sample Size Two Cases and Markov Bases of Separable Models"(Japanese Paper)2007

    • Author(s)
      Hara, H.
    • Organizer
      Toukei Kanren Gakkai Rengo Taikai Kobe
    • Place of Presentation
      Japan
    • Year and Date
      2007-09-08
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 標本数2のファイバーの構造と分解可能モデルのマルコフ基底2007

    • Author(s)
      原 尚幸
    • Organizer
      I統計関連学会連合大会
    • Place of Presentation
      神戸大学(神戸)
    • Year and Date
      2007-09-08
    • Related Report
      2007 Annual Research Report
  • [Presentation] データスワップとマルコフ基底の関係2007

    • Author(s)
      原 尚幸
    • Organizer
      応用統計学会年会
    • Place of Presentation
      東京
    • Year and Date
      2007-05-24
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] "Relationships between Data-Swap and Markov Bases"(Japanese Paper)2007

    • Author(s)
      Hara, H.
    • Organizer
      Annual Meeting, Japanese Society of Applied Statistics
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2007-05-24
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] データスワップとマルコフ基底の関係2007

    • Author(s)
      原 尚幸
    • Organizer
      応用統計学会年会
    • Place of Presentation
      東京工業大学(東京)
    • Year and Date
      2007-05-24
    • Related Report
      2007 Annual Research Report
  • [Presentation] A Super-Efficient Test for the Censored Regression Model2006

    • Author(s)
      縄田和満
    • Organizer
      日本経済学会秋季大会
    • Place of Presentation
      大阪
    • Year and Date
      2006-10-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] A Super-Efficient Test for the Censored Regression Model2006

    • Author(s)
      Nawata, K.
    • Organizer
      Autumn Meeting, Japan Economic Association
    • Place of Presentation
      Osaka, Japan
    • Year and Date
      2006-10-22
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Improvmg on the Maximum Likelihood Estimators of the means in Poisson Decomposable Graphical Models2006

    • Author(s)
      Hara, H.
    • Organizer
      統計関連学会連合大会
    • Place of Presentation
      仙台
    • Year and Date
      2006-09-07
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Improving on the Maximum Likelihood Estimators of the means in Poisson Decomposable Graphical Models2006

    • Author(s)
      Hara, H.
    • Organizer
      Toukei Kanren Gakkai Rengo Taikai Sendai
    • Place of Presentation
      Japan
    • Year and Date
      2006-09-07
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] An Analysis of the Length of Stay and the Effectiveness of Treatment for Hip Fractured Patients in Japan: Evaluation of the Revision of the 2002 Medical Service Fee Schedule2005

    • Author(s)
      Nawata, K.
    • Organizer
      International Congress on Modeling and Simulation
    • Place of Presentation
      Melbourne, Australia
    • Year and Date
      2005-12-12
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] An Analysis of the Length of Stay and the Effectiveness of Treatment for Hip Fractured Patients in Japan : Evaluation of the Revision of the 2002 Medical Service Fee Schedule2005

    • Author(s)
      Nawata, K.
    • Organizer
      International Congress on Modeling and Simulation
    • Place of Presentation
      Melbourne, Australia
    • Year and Date
      2005-12-12
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Poisson乗法モデルにおける平均パラメータの同時推定2005

    • Author(s)
      原 尚幸
    • Organizer
      Poisson乗法モデルにおける平均パラメータの同時推定
    • Place of Presentation
      広島
    • Year and Date
      2005-09-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] "Simultaneous Estimation of the Means in Productive Poisson Models"(Japanese paper)2005

    • Author(s)
      Hara, H.
    • Organizer
      Toukei Kanren Gakkai Rengo Taikai
    • Place of Presentation
      Hiroshima, Japan
    • Year and Date
      2005-09-13
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Simultaneous Estimation of the Means in Some Poisson Log Linear Models2005

    • Author(s)
      Hara, H.
    • Organizer
      East Asia Joint Statistical Conference
    • Place of Presentation
      Beijing, China
    • Year and Date
      2005-04-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Simultaneous Estimation of the Means in Some Poisson Log Linear Models2005

    • Author(s)
      Hara, H.
    • Organizer
      East Asia Joint Statistical Conference
    • Place of Presentation
      Beijing, China.
    • Year and Date
      2005-04-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] "A Simple Method for Detecting the Unobserved Hetrogenenity of the Hazard Function in the Discrete-Type Proportional Hazard Model-An Analysis of the Length of Hospital Stay of Patients Hospitalized for Catarct"(Japanese Paper)

    • Author(s)
      Nawata, K.
    • Organizer
      Autumn Meeting, Japan Economic Association
    • Place of Presentation
      Tokyo, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] Excelによる統計入門・Excel 2007対応版2007

    • Author(s)
      縄田和満
    • Total Pages
      201
    • Publisher
      朝倉書店
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 計量経済学ハンドブック2007

    • Author(s)
      簑谷千凰彦、縄田和満、和合肇編
    • Total Pages
      1016
    • Publisher
      朝倉書店
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Book] Introduction to Statistics using Excel 2007,(In Japanese)2007

    • Author(s)
      Nawata, K.
    • Total Pages
      201
    • Publisher
      Asakura Publishing Co. Ltd.
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] Nawata and H. Wago, eds., Handbook of Econometrics(In Japanese)2007

    • Author(s)
      Minotani, C., K.
    • Total Pages
      1016
    • Publisher
      Asakura Publishing Co. Ltd.
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] Excelによる統計入門-Excel2007対応版-2007

    • Author(s)
      縄田和満
    • Total Pages
      201
    • Publisher
      朝倉書店
    • Related Report
      2007 Annual Research Report
  • [Book] TSPによる計量経済分析入門(第2版)2006

    • Author(s)
      縄田和満
    • Total Pages
      175
    • Publisher
      朝倉書店
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2005 Annual Research Report
  • [Book] Introduction to Econometrics using the TSP,(In Japanese)2006

    • Author(s)
      Nawata, K.
    • Total Pages
      175
    • Publisher
      Asakura Publishing Co. Ltd.
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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