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Test for the existence of moments

Research Project

Project/Area Number 17K03656
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Economic statistics
Research InstitutionKyoto Institute of Technology

Principal Investigator

Hitomi Kohtaro  京都工芸繊維大学, 基盤科学系, 教授 (00283680)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywordsoptimal minimax rate / nearest neighour method / instrumental variables / 操作変数回帰 / 最近傍法 / 逐次検定 / 時系列 / 単位根 / 逐次解析 / 和分次数 / 操作変数 / minimax検定 / 関数型 / 計量経済学 / 検定 / モーメント
Outline of Final Research Achievements

This study investigates optimal minimax rates for specification testing
when the alternative hypothesis is built on a set of non-smooth functions. The set consists of bounded functions that are not necessarily differentiable with no smoothness constraints imposed on their derivatives. In the instrumental variable regression set up with an unknown error variance structure, we find that the optimal minimax rate is -1/4 power of n, where n is the sample size. The rate is achieved by a simple test based on the difference between non-parametric and parametric variance estimators. Simulation studies illustrate that the test has reasonable power against various non-smooth alternatives. The empirical application to Engel curves specification emphasizes the good applicability of the test.

Academic Significance and Societal Importance of the Research Achievements

既存の研究では 関数型の検定の minimax rate は対立仮説が滑らかな関数の集合に含まれる場合のみしかわかっていなかった。しかし、経済学の場合には流動性制約などによって需要関数やエンゲル曲線が微分不可能な点が存在することがあることが知られている。
未知の誤差分散構造を持つ操作変数回帰の設定では,対立仮設が滑らかでない関数である場合の最適な minimax rate はnをサンプルサイズとして nの(-1/4)乗 であることを発見し、簡単な検定を開発した。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 Other

All Presentation (8 results) (of which Int'l Joint Research: 4 results) Remarks (1 results)

  • [Presentation] Joint Asymptotic Normality of Stopping Times and Sequential Estimators for Monitoring Autoregressive Processes2019

    • Author(s)
      Nagai K., K. Hitomi, Y. Nishiyama and J. Tao
    • Organizer
      62nd ISI World Statistics Congress
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] onitoring Unit Root in Sequentially Observed Autoregressive Processes against Local-to-unity hypotheses2019

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao
    • Organizer
      62nd ISI World Statistics Congress
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] The relationship between Dickey-Fuller test and Sequential unit root test for first-order autoregressive model2019

    • Author(s)
      K. Nagai, K. Hitomi, Y. Nishiyama, J. Tao
    • Organizer
      Japanese joint statistical meeting 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Sequential detection of the order of integration for pth-order autoregressive model2019

    • Author(s)
      K. Nagai, K. Hitomi, Y. Nishiyama, J. Tao
    • Organizer
      Japanese joint statistical meeting 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Monitoring Unit Root in Sequentially Observed Autoregressive Processes against Local-to-unity hypotheses2019

    • Author(s)
      K. Nagai, Y. Nishiyama, K Hitomi, J. Tao
    • Organizer
      ISI World Statistics Congress
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Joint Asymptotic Normality of Stopping Time and Sequential Estimators for Monitoring Autoregressive Processes2019

    • Author(s)
      J. Tao, K. Nagai, Y. Nishiyama, K Hitomi,
    • Organizer
      ISI World Statistics Congress
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sequential Unit Root Test in AR(p) Model2018

    • Author(s)
      K. Nagai, K Hitomi, Y. Nishiyama, J. Tao
    • Organizer
      統計関連学会連合大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Sequential estimation for strongly stationary AR (p) process2018

    • Author(s)
      K. Nagai, Y. Nishiyama, K Hitomi, J. Tao
    • Organizer
      統計関連学会連合大会
    • Related Report
      2018 Research-status Report
  • [Remarks] 京都大学経済研究所出版物

    • URL

      https://www.kier.kyoto-u.ac.jp/wp/wp-content/uploads/2021/01/DP1051.pdf

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2022-01-27  

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