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NAGAI KEIJI  永井 圭二

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… Alternative Names

NAGAI Keiji  永井 圭二

永井 圭二  ナガイ ケイジ

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Researcher Number 50311866
Other IDs
Affiliation (Current) 2025: 横浜国立大学, 大学院国際社会科学研究院, 教授
Affiliation (based on the past Project Information) *help 2016 – 2024: 横浜国立大学, 大学院国際社会科学研究院, 教授
2013 – 2015: 横浜国立大学, 国際社会科学研究院, 教授
2014: 横浜国立大学, その他の研究科, 教授
2014: 横浜国立大学, 経済学部, 教授
2012 – 2013: 横浜国立大学, 大学院国際社会科学研究院, 教授 … More
2007 – 2012: 横浜国立大学, 国際社会科学研究科, 教授
2010: 国立大学法人 横浜国立大学, 国際社会科学研究科, 教授
2008 – 2010: Yokohama National University, 大学院・国際社会科学研究科, 教授
2009: Yokohama National University, 経済学部, 教授
2008: Yokohama National University, 国際社会科学研究科, 教授
2007: Yokohama National University, 大学院・国際社会科学研空科, 教授
2006: 横浜国立大学, 国際社会科学研究科, 助教授
2006: 横浜国立大学, 大学院国際社会科学研究科, 助教授
2005 – 2006: 横浜国立大学, 大学院・国際社会科学研究科, 助教授
2002: 横浜国立大学, 国際社会研究科, 助教授
2001: 長崎大学, 経済学部, 助教授 Less
Review Section/Research Field
Principal Investigator
Economic statistics / Basic Section 07030:Economic statistics-related / Economic statistics
Except Principal Investigator
Applied economics / Economic statistics / Medium-sized Section 7:Economics, business administration, and related fields / Statistical science
Keywords
Principal Investigator
停止時刻 / ベッセル過程 / 単位根検定 / 分枝過程 / 逐次解析 / 統計的逐次解析 / 情報量 / 観測されたフィッシャー情報量 / ブラウン運動 / Bessel過程 … More / 汎関数中心極限定理 / 逐次検定 / 時間変更 / 局所漸近正規 / 自己回帰過程 / 経済統計 / ファイナンス / 計量経済学 / 更新定理 / 変化点問題 / 生存時間分析 / GARCH / 非エルゴード的時系列 / バブル検定 / 拡散近似 / 基本再生産数 / 局所対立仮説 / 時間変更されたブラウン運動 / DDSブラウン運動 / 局所パラメータ / 最小リスク共変推定 / 一様最強力不変検定 / 一様最小リスク共変推定 / 一様最強力不 検定 / 二乗ベッセル過程 / 時間変更によるブラウン運動 / 観測フィッシャー情報量 / 非エルゴード的確率過程 / 非線形定常時系列 / 非定常時系列解析 / 経済・金融時系列 / オンラインモニタリング / 結合密度関数 / Bessel bridge / 一様最強力検定 / フィッシャー情報量 / 非エルゴード性 / モニタリング / 結合ラプラス変換 / 臨界性検定 / 非エルゴード的問題 / 早期意思決定 / 早期検知・探索 / パネルデータ / 伊藤過程 / マルチンゲール中心極限定理 / オンライン意思決定 / オンライン検知・探索 / Fisher情報量 / 時系列過程 / 確率解析 / p階自己回帰過程 / 時系列解析 / Renewal theory / Sequential test / Nonparametrics / Unit Root Test / Nonsyncronous Observation / Volatility / High-frequency data / Financial Econometrics / ベイズ法 / 経験尤度法 / らんだむ / ノンパラメトリック法 / 非同期観測 / ボラティリティ / 高頻度データ / 計量ファイナンス / 国際情報交換 / 確率解析の応用 / 変化点探索 / 分枝過程の臨界性 / 非定常時系列 / 停止時刻による統計解析 / 局所漸近最適性 / 統計的意思決定論 / 統計的逐次探索 / 逐次統計学 / オンラインリスク管理 / 債券データ / U統計量 / 比例ハザードモデル / セミパラメトリック / 流動性プレミアム / U-統計量 / 利子率の期間構造 / セミパラメトリックモデル / 生存時間解析 … More
Except Principal Investigator
サバイバル分析 / R&D / イノベーション / ベンチャー / モーメント条件 / 経済統計学 / ノンパラメトリック法 / セミパラメトリック法 / ノンパラメトリック / 時系列モデル / 分枝過程 / 自己回帰モデル / criticality test / 臨界性検定 / 単位根検定 / 逐次解析 / ラプラス変換 / 時系列 / ベッセル過程 / DDSブラウン運動 / criticality / 単位根 / 逐次検定 / model averaging / 因果性 / 漸近有効性 / 操作変数 / マークアップ / 独占 / 構造モデル / 構想推定 / 輸送コスト / DID / 生産性 / 特定化検定 / 個人の異質性 / 動学パネル / 表明選好分析 / コンジョイント分析 / ランダムパラメーターロジット・モデル / 計量経済分析 / 経済実証 / パネルデータ / 企業家 / R & D / 企業金融 / 空間クラスター分析 / 生物・遺伝データ解析 / 空間疫学 / 高次元データ / クリギング / 空間回帰モデル / 時空間時計解析 / ミクロデータ解析 / 大規模データ解析 / 確率場の推測理論 / 都市・地域データ解析 / 小地域データ解析 / 生物・遺伝・環境データ解析 / 生物・遺伝統計学 / 地球・環境統計学 / 時空間疫学 / 都市・地域データ分析 / 大規模時空間データ / 時空間統計解析 / ノンセミパラメトリック局外数 / 二次漸近効率 / ノンセミパラメトリック推定 / セミパラメトリック推定 / 統計数理 / 経済統計 / 統計数学 / モ-メント条件 / Cressie-Read Power Divergence / マイクロストラクチャーノイズ / Cressie-Read power divergence / マイクロストラクチャノイズ / 長記憶 / 漸近理論 / セミパラメトリック Less
  • Research Projects

    (15 results)
  • Research Products

    (100 results)
  • Co-Researchers

    (24 People)
  •  Statistical sequential analysis for non ergodic time series based on informationPrincipal Investigator

    • Principal Investigator
      永井 圭二
    • Project Period (FY)
      2024 – 2026
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 07030:Economic statistics-related
    • Research Institution
      Yokohama National University
  •  Statistical sequential analysis on Galton-Watson branching processes by stopping times based on informationPrincipal Investigator

    • Principal Investigator
      Nagai Keiji
    • Project Period (FY)
      2021 – 2023
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 07030:Economic statistics-related
    • Research Institution
      Yokohama National University
  •  Sequential analysis for economic time series and its applications - Detection of financial bubbles

    • Principal Investigator
      Nishiyama Yoshihiko
    • Project Period (FY)
      2019 – 2022
    • Research Category
      Grant-in-Aid for Challenging Research (Exploratory)
    • Review Section
      Medium-sized Section 7:Economics, business administration, and related fields
    • Research Institution
      Kyoto University
  •  Statistical Sequential Analysis of Non-stationary Time Series using Stopping Times Based on InformationPrincipal Investigator

    • Principal Investigator
      Nagai Keiji
    • Project Period (FY)
      2018 – 2020
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 07030:Economic statistics-related
    • Research Institution
      Yokohama National University
  •  Statistical Sequential Analysis via Stochastic Calculus and It's ApplicationPrincipal Investigator

    • Principal Investigator
      NAGAI KEIJI
    • Project Period (FY)
      2015 – 2017
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Economic statistics
    • Research Institution
      Yokohama National University
  •  Statistical Sequential Testing and Change-point Detection on NonstationarityPrincipal Investigator

    • Principal Investigator
      NAGAI KEIJI
    • Project Period (FY)
      2012 – 2014
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Economic statistics
    • Research Institution
      Yokohama National University
  •  Nonparametric/semiparametric statistical analysis of microeconometric models

    • Principal Investigator
      NISHIYAMA Yoshihiko
    • Project Period (FY)
      2010 – 2014
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Economic statistics
    • Research Institution
      Kyoto University
  •  Statistical Sequential Analysis for Stochastic Processes and Its Application to Risk ManagementPrincipal Investigator

    • Principal Investigator
      NAGAI Keiji
    • Project Period (FY)
      2009 – 2011
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Economic statistics
    • Research Institution
      Yokohama National University
  •  Economic Analysis of Start-up Firms Growth

    • Principal Investigator
      AKIYAMA Taro
    • Project Period (FY)
      2009 – 2011
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Applied economics
    • Research Institution
      Yokohama National University
  •  On a comprehensive research on statistical modelling and analysis for spatio-temporal data

    • Principal Investigator
      YAJIMA Yoshihiro
    • Project Period (FY)
      2007 – 2010
    • Research Category
      Grant-in-Aid for Scientific Research (A)
    • Research Field
      Statistical science
    • Research Institution
      The University of Tokyo
  •  Inference based on stopping times for econometric models represented by random fieldsPrincipal Investigator

    • Principal Investigator
      永井 圭二
    • Project Period (FY)
      2007 – 2008
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Economic statistics
    • Research Institution
      Yokohama National University
  •  計量ベンチャー評価学の構築に向けて

    • Principal Investigator
      AKIYAMA Taro
    • Project Period (FY)
      2007 – 2008
    • Research Category
      Grant-in-Aid for Exploratory Research
    • Research Field
      Applied economics
    • Research Institution
      Yokohama National University
  •  Semiparametric Econometrics based on moment conditions-theory and applications

    • Principal Investigator
      NISHIYAMA Yoshihiko (YOSHIHIKO Nishiyama)
    • Project Period (FY)
      2006 – 2009
    • Research Category
      Grant-in-Aid for Scientific Research (A)
    • Research Field
      Economic statistics
    • Research Institution
      Kyoto University
  •  Statistical Inference for Duration Model using High-Frequency Financial Time SeriesPrincipal Investigator

    • Principal Investigator
      NAGAI Keiji
    • Project Period (FY)
      2005 – 2006
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Economic statistics
    • Research Institution
      Yokohama National University
  •  多変量セミパラメトリック生存時間分析のパネルデータへの応用Principal Investigator

    • Principal Investigator
      永井 圭二
    • Project Period (FY)
      2001 – 2002
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Economic statistics
    • Research Institution
      Yokohama National University
      Nagasaki University

All 2024 2023 2022 2021 2020 2019 2018 2014 2012 2011 2010 2009 2008 2007 2006 2005 Other

All Journal Article Presentation

  • [Journal Article] Sequential test for a unit root in monitoring a p-th order autoregressive process2023

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Journal Title

      Advances in Econometrics: Essays in Honor of Joon Y. Park

      Volume: - Pages: 115-153

    • DOI

      10.1108/s0731-90532023000045a004

    • ISBN
      9781837532094, 9781837532087
    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691, KAKENHI-PROJECT-21K01422
  • [Journal Article] Unit root tests considering initial values and a concise method for computing power2022

    • Author(s)
      Jianwei Jin, Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Journal Title

      KIER Discussion Paper Series, Kyoto University

      Volume: No. 1084 Pages: 1-13

    • Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Journal Article] Sequential unit root test for first-order autoregressive processes with initial values2022

    • Author(s)
      Jianwei Jin, Keiji Nagai
    • Journal Title

      KIER Discussion Paper Series, Kyoto University

      Volume: No. 1085 Pages: 1-16

    • Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Journal Article] Unit root tests considering initial values and a concise method for computing powers2022

    • Author(s)
      Kohtaro Hitomi, Jianwei Jin, Keiji Nagai, Yoshihiko Nishiyama and Junfan Tao
    • Journal Title

      KIER Discussion Paper Series

      Volume: 1084 Pages: 1-20

    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Journal Article] Sequential test for a unit root in monitoring a p-th order autoregressive process2022

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Journal Title

      Advances in Econometrics: Essays in Honor of Joon Y. Park

      Volume: 1 Pages: 1-31

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Journal Article] Sequential tests for criticality of branching process with immigration2021

    • Author(s)
      J. Tao, K. Nagai
    • Journal Title

      Discussion Paper Series, Center for Economic Growth Strategy, Yokohama National University

      Volume: 2020-CEGS-05 Pages: 1-14

    • Open Access
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Journal Article] Sequential tests for criticality of branching process with immigration2021

    • Author(s)
      Junfan Tao, and Keiji Nagai
    • Journal Title

      Discussion Paper Series, CEGS, Yokohama National University

      Volume: 2020-CEGS-05 Pages: 1-14

    • Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Journal Article] Sequential test for a unit root in monitoring a p-th order autoregressive process2021

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Journal Title

      Advances in Econometrics

      Volume: Accepted

    • Peer Reviewed / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Journal Article] Sequential unit root test for AR(p) process2014

    • Author(s)
      K.Nagai and Y, Xu
    • Journal Title

      横浜国立大学国際 社会科学研究科, 博士(経済学)学位論文, Xu Yun (許贇)

      Volume: 国社博甲第245 号 Pages: 36-50

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-24530226
  • [Journal Article] Sequential multiple unit root test for AR(p) process2014

    • Author(s)
      Y. Xu and K.Nagai
    • Journal Title

      横浜国立大学国際 社会科学研究科, 博士(経済学)学位論文, Xu Yun (許贇)

      Volume: 国社博甲第245 号 Pages: 51-61

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-24530226
  • [Journal Article] Nonparametric estimation methods of integrated multivariate volatilities2008

    • Author(s)
      T.Hoshikawa, K.Nagai, T.Kanatani and Y.Nishiyama
    • Journal Title

      Econometric Reviews 27

      Pages: 112-138

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19200020
  • [Journal Article] Nonparametric Estimation Methods of Integrated Multivariate Volatilities2008

    • Author(s)
      Hoshikawa, T., T. Kanatani, K. Nagai, Y. Nishiyama
    • Journal Title

      Econometric Reviews 27:1

      Pages: 112-138

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Journal Article] Nonparametric Methods of Estimating Integrated multivariate Volatilities2008

    • Author(s)
      Hoshikawa, T., T. Kanatani, K. Nagai, Y. Nishivama
    • Journal Title

      Econometric Reviews 27

      Pages: 112-138

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Journal Article] Nonparametric Methods of Estimating Integrated multivariate Volatilities2008

    • Author(s)
      Hoshikawa, T., T. Kanatani, K. Nagai, and Y. Nishiyama
    • Journal Title

      Econometric Reviews 27

      Pages: 112-138

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Journal Article] Nonparametric methods of estimating integrated multivariate volatilities2007

    • Author(s)
      T Hoshikawa, T Kanatani, K Nagai, Y Nishiyama
    • Journal Title

      Realized Volatility and Long Memory, special double issue of Econometric Reviews (Taylor and Francis) (forthcoming)

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Nonparametric methods of estimating integrated multivariate volatilities2007

    • Author(s)
      T.Hoshikawa, T.Kanatani, K.Nagai, Y.Nishiyama
    • Journal Title

      Realized Volatility and Long Memory, special double issue of Econometric Reviews (Taylor and Francis) (Forthcoming)

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Nonparametric methods of estimating integrated multivariate volatilities2007

    • Author(s)
      T.Hoshikawa, T.Kanatani, K.Nagai, Y.Nishiyama
    • Journal Title

      Econometric Reviews (forthcoming)

    • Data Source
      KAKENHI-PROJECT-18203014
  • [Journal Article] Nonparametric Estimation for the High Frequency Observations of Multivariate Ito Processes2007

    • Author(s)
      K.Nagai, M.J.Song
    • Journal Title

      宋明子氏の横浜国立大学大学院国際社会科学研究科博士号学位論文 (所収)

    • Data Source
      KAKENHI-PROJECT-18203014
  • [Journal Article] A Sequential Unit Root Test2007

    • Author(s)
      Nagai, K., Y. Nishiyama and K. Hitomi
    • Journal Title

      Proceedings of MODSIMO7

      Pages: 3031-3036

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Journal Article] Nonlinear renewal theorems for random walks with perturbations of intermediate order2006

    • Author(s)
      Keiji Nagai, Cun-Hui Zhang
    • Journal Title

      IMS Lecture Notes-Monograph Series Recent Developments in Nonparametric Inference and Probability Vol 50

      Pages: 164-175

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Nonlinear renewal theorems for random walks with perturbations of intermediate order2006

    • Author(s)
      K. Nagai, Cun-Hui Zhang
    • Journal Title

      IMS Lecture Notes-Monograph Series Recent Developments in Nonparametric Inference and Probability Vol.50

      Pages: 164-175

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Journal Article] Nonlinear renewal theorems for random walks with perturbations of intermediate order2006

    • Author(s)
      Keiji Nagai, Cun-Hui Zhang
    • Journal Title

      IMS Lecture Notes-Monograph Series Recent Developments in Nonparametric Inference and Probability 50

      Pages: 164-175

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Nonlinear renewal theorems for random walks with perturbations of intermediate order2006

    • Author(s)
      K.Nagai, Cun-Hui Zhang
    • Journal Title

      IMS Lecture Notes-Monograph Series Recent Developments in Nonparametric Inference and Probability Vol. 50

      Pages: 164-175

    • Data Source
      KAKENHI-PROJECT-18203014
  • [Journal Article] Parameter estimation of diffusion processes via GARCH MLE2005

    • Author(s)
      永井圭二, 宋明子
    • Journal Title

      統計関連学会 連合大会 報告集

      Pages: 108-108

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Sequential estimation of autoregressive parameter with ARCH errors2005

    • Author(s)
      Keiji Nagai, Yosuke Takahashi
    • Journal Title

      Proceedings of Japan Statistical Society

      Pages: 103-103

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Parameter estimation of diffusion processes via GARCH MLE2005

    • Author(s)
      永井圭二, 宋明子
    • Journal Title

      統計関連学会連合大会報告集

      Pages: 108-108

    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Empirical likelihood estimation for regression model with ARCH errors2005

    • Author(s)
      永井圭二, 秋山宣久
    • Journal Title

      統計関連学会連合大会報告集

      Pages: 105-105

    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Sequential estimation of autoregressive parameter with ARCH errors2005

    • Author(s)
      永井圭二, 高橋陽介
    • Journal Title

      統計関連学会連合大会報告集

      Pages: 103-103

    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Nonparametric methods of estimating integrated multivariate volatilities

    • Author(s)
      K.Nagai, T.Hoshikawa, T.Kanatani, Y.Nishiyama
    • Journal Title

      Econometric Reviews (Forthcoming)

    • Data Source
      KAKENHI-PROJECT-17530165
  • [Journal Article] Nonparametric Estimation for the High Frequency Observations of Multivariate Ito Processes

    • Author(s)
      永井 圭二, 宋明子
    • Data Source
      KAKENHI-PROJECT-17530165
  • [Presentation] Local Asymptotic Optimality of Equivariant Sequential Estimation in Autoregressive Process2024

    • Author(s)
      Keiji Nagai
    • Organizer
      関西計量経済学研究会
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Presentation] Unit root tests with initial values and a concise method for computing powers2023

    • Author(s)
      Kohtaro Hitomi, Jianwei Jin, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      Kohtaro Hitomi, Jianwei Jin, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential Test for Unit Root in First Order Autoregressive Model2021

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      2021 Japanese Economic Association Autumn Meeting
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Time-changed method in non-ergodic autoregressive process and branching process2021

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      2021 Japanese Economic Association Autumn Meeting
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential criticality test for branching process with immigration2021

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      63rd ISI World Statistics Congress 2021 (ISI WSC 2021) (Online)
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Criticality test for branching processes with immigration2021

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      Japanese joint statistical meeting 2021
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential test for a unit root in monitoring a p-th order autoregressive process2021

    • Author(s)
      Keiji Nagai, Yoshihiko Nishiyama, Kohtaro Hitomi, and Junfan Tao
    • Organizer
      Japanese Economic Association Spring Meeting
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Presentation] Time-changed method in non-ergodic autoregressive process and branching process2021

    • Author(s)
      Keiji Nagai, Yoshihiko Nishiyama, Kohtaro Hitomi, and Junfan Tao
    • Organizer
      Japanese Economic Association Autumn Meeting
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Presentation] Detection of a unit root in monitoring AR(p) process with combination of a sequential procedure and the augmented Dickey-Fuller test2021

    • Author(s)
      Keiji Nagai
    • Organizer
      The 28th Kansai Keiryo Keizaigaku Kenkyukai(関西計量経済学研究会)
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] Sequential Test for the Criticality of Branching Processes2021

    • Author(s)
      Keiji Nagai, Yoshihiko Nishiyama, Kohtaro Hitomi, and Junfan Tao
    • Organizer
      Japanese Economic Association Autumn Meeting
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Presentation] Sequential Test for the Criticality of Branching Processes,2021

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      2021 Japanese Economic Association Autumn Meeting
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential analysis on branching process with immigration with a stopping time based on the observed Fisher information2021

    • Author(s)
      K.Nagai, K. Hitomi, Y.Nishiyama, and J. Tao
    • Organizer
      関西計量経済学研究会
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Criticality test for branching processes with immigration2021

    • Author(s)
      Keiji Nagai, Yoshihiko Nishiyama, Kohtaro Hitomi, and Junfan Tao
    • Organizer
      Japanese joint statistical meeting 2021Japanese joint statistical meeting 2021
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Presentation] Sequential Test for Unit Root in First Order Autoregressive Model2021

    • Author(s)
      Keiji Nagai, Yoshihiko Nishiyama, Kohtaro Hitomi, and Junfan Tao
    • Organizer
      Japanese Economic Association Autumn Meeting
    • Invited
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Presentation] Sequential criticality test for branching process with immigration2021

    • Author(s)
      Keiji Nagai, Kohtaro Hitomi, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      63rd International Statistical Institute World Statistics Congress 2021
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-21K01422
  • [Presentation] Sequential test for a unit root in monitoring a p-th order autoregressive process2021

    • Author(s)
      Kohtaro Hitomi, Keiji Nagai, Yoshihiko Nishiyama, and Junfan Tao
    • Organizer
      2021 Japanese Economic Association Spring Meeting
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Detection of a unit root in monitoring AR(p) process with combination of a sequential procedure and the augmented Dickey-Fuller test2021

    • Author(s)
      K.Nagai, K. Hitomi, Y.Nishiyama, and J. Tao
    • Organizer
      関西計量経済学研究会
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential test for the criticality of branching processes2020

    • Author(s)
      Keiji Nagai
    • Organizer
      Japan Joint Statistical Meeting (統計関連学会連合大会)
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] The role of Bessel processes on the sequential test for a unit root in autoregressive process and criticality in branching process2020

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao
    • Organizer
      統計連合大会
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Operating characteristics of sequential unit root tests obtained from the Bessel bridges2020

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao.
    • Organizer
      Bernoulli-IMS One World Symposium
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Operating characteristics of sequential unit root tests obtained from the Bessel bridges2020

    • Author(s)
      Keiji Nagai
    • Organizer
      Bernoulli-IMS, One World Symposium
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] The role of Bessel processes on the sequential test for a unit root in autoregressive process and criticality in branching processes2020

    • Author(s)
      K.Nagai, K. Hitomi, Y.Nishiyama and J. Tao
    • Organizer
      Bernoulli-IMS One World Symposium
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential test for the criticality of branching processes2020

    • Author(s)
      K.Nagai, K. Hitomi, Y.Nishiyama and J. Tao
    • Organizer
      統計連合大会
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Joint Asymptotic Normality of Stopping Times and Sequential Estimators in Monitoring Autoregressive Processes2019

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao
    • Organizer
      62nd ISI World Statistics Congress 2019, International Statistical Institute
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] Monitoring Unit Root in Sequentially Observed Autoregressive Processes against Local-to-unity hypotheses”,2019

    • Author(s)
      [1]K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao
    • Organizer
      62nd ISI World Statistics Congress 2019, International Statistical Institute
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] The relationship between Dickey-Fuller test and Sequential unit root test for first-order autoregressive model2019

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao.
    • Organizer
      Japanese joint statistical meeting 2019, Shiga University
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential Unit Root Test2019

    • Author(s)
      Y. Nishiyama, Kohtaro Hitomi, Keiji Nagai
    • Organizer
      Workshop on Recent Progress in Time Series in honour of Peter Robinson
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] Statistical Sequential Analysis of Autoregressive Processes2019

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao.
    • Organizer
      Data Science Seminar, Shiga University
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential Unit Root Test2019

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao.
    • Organizer
      Econometrics Symposium in honor of Peter M. Robinson
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [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
      2019年度統計関連学会連合大会 / Japanese joint statistical meeting 2019
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] Sequential detection of the order of integration for pth-order autoregressive mode2019

    • Author(s)
      K. Nagai, Y. Nishiyama, K. Hitomi, J. Tao
    • Organizer
      2019年度統計関連学会連合大会 / Japanese joint statistical meeting 2019
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] Monitoring 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 2019 (ISI WSC 2019), Kuala Lumpur, Malaysia
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Joint Asymptotic Normality of Stopping Times and Sequential Estimators in Monitoring Autoregressive Processes2019

    • Author(s)
      K.Nagai, Y.Nishiyama, K. Hitomi, and J. Tao.
    • Organizer
      62nd ISI World Statistics Congress 2019 (ISI WSC 2019), Kuala Lumpur, Malaysia
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K21691
  • [Presentation] Sequential Unit Root Test in AR(p) Model2018

    • Author(s)
      Keiji Nagai
    • Organizer
      日本統計関連連合大会
    • Data Source
      KAKENHI-PROJECT-18K01543
  • [Presentation] Sequential Unit Root Tests, The Chinese University of Hong Kong Statistics Seminar2012

    • Author(s)
      Nagai, K.
    • Organizer
      Department of Statistics
    • Place of Presentation
      The Chinese University of Hong Kong Shatin, N. T., Hong Kong
    • Year and Date
      2012-01-12
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Sequential Unit Root Tests2012

    • Author(s)
      Keiji Nagai
    • Organizer
      応用統計ワークショップ
    • Place of Presentation
      東京大学(東京都)
    • Year and Date
      2012-01-20
    • Data Source
      KAKENHI-PROJECT-21530212
  • [Presentation] Sequential Unit Root Tests2012

    • Author(s)
      永井圭二
    • Organizer
      応用統計ワークショップ
    • Place of Presentation
      東京大学
    • Year and Date
      2012-01-20
    • Data Source
      KAKENHI-PROJECT-22330067
  • [Presentation] Sequential Unit Root Tests2012

    • Author(s)
      K.Nagai
    • Organizer
      The Chinese University of Hong Kong Statistics Seminar
    • Place of Presentation
      The Chinese University of Hong Kong
    • Year and Date
      2012-01-12
    • Data Source
      KAKENHI-PROJECT-22330067
  • [Presentation] Sequential Unit Root Tests2012

    • Author(s)
      Keiji Nagai
    • Organizer
      The Chinese University of Hong Kong Statistics Seminar
    • Place of Presentation
      香港
    • Year and Date
      2012-01-12
    • Data Source
      KAKENHI-PROJECT-21530212
  • [Presentation] Seqeuential Unit Root Tests2012

    • Author(s)
      K.Nagai
    • Organizer
      The Chinese University of Hong Kong Statistics Seminar
    • Place of Presentation
      Department of Statistics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong(招待講演)
    • Year and Date
      2012-01-12
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Sequential Unit Root Tests2012

    • Author(s)
      Keiji Nagai
    • Organizer
      The Chinese University of Hong Kong Statistics Seminar
    • Place of Presentation
      The Chinese University of Hong Kong (香港)(招待講演)
    • Year and Date
      2012-01-12
    • Data Source
      KAKENHI-PROJECT-21530212
  • [Presentation] Sequential Unit Root Tests、応用統計ワークショップ2012

    • Author(s)
      永井圭二
    • Organizer
      東京大学大学院経済学研究科学術交流棟
    • Place of Presentation
      小島ホール(東京)
    • Year and Date
      2012-01-20
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Sequential Unit Root Tests2012

    • Author(s)
      永井圭二
    • Organizer
      応用統計ワークショップ
    • Place of Presentation
      東京大学大学院経済学研究科学術交流棟(小島ホール)(東京)
    • Year and Date
      2012-01-20
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Sequential Test for Nearly Nonstationary AR(p) Processes2011

    • Author(s)
      Keiji Nagai
    • Organizer
      Recent Development in Statistics, Empirical Finance and Econometrics
    • Place of Presentation
      京都大学楽友会館(京都府)
    • Year and Date
      2011-11-30
    • Data Source
      KAKENHI-PROJECT-21530212
  • [Presentation] Sequential Test for Nearly Nonstationary AR (p) Processes2011

    • Author(s)
      K.Nagai
    • Organizer
      Recent Development in Statistics, Empirical Finance and Econometries
    • Place of Presentation
      Rakuyu-Kaikan, Kyoto University, KYOTO, JAPAN
    • Year and Date
      2011-11-30
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Sequential Test for Nearly Nonstationary AR(p) Processes2011

    • Author(s)
      Nagai, K.
    • Organizer
      Recent Development in Statistics, Empirical Finance and Econometrics
    • Place of Presentation
      Rakuyu-Kaikan, Kyoto University KYOTO, JAPAN
    • Year and Date
      2011-11-30
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Sequential Test for Nearly Nonstationary AE(p) Processes2011

    • Author(s)
      K.Nagai
    • Organizer
      Recent Development in Statistics, Empirical Finance and Econometrics
    • Place of Presentation
      Rakuyu-Kaikan, Kyoto University
    • Year and Date
      2011-11-30
    • Data Source
      KAKENHI-PROJECT-22330067
  • [Presentation] Multiplicative Intensity Model Depending on Calendar time2010

    • Author(s)
      Nagai, K.
    • Organizer
      The International Symposium on Statistical Analysis of Spatio-Temporal Data
    • Place of Presentation
      The Chambers of Commerce and Industry of Kamakura City
    • Year and Date
      2010-11-05
    • Data Source
      KAKENHI-PROJECT-22330067
  • [Presentation] Multiplicative Intensity Model Depending on Calendar time2010

    • Author(s)
      Nagai, K.
    • Organizer
      The International Symposium on Statistical Analysis of Spatio-Temporal Data
    • Place of Presentation
      The Chambers of Commerce and Industry of Kamakura City
    • Year and Date
      2010-11-05
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Offshoring and Corporate Organizations : Evidence from Japanese Firm-level Data2010

    • Author(s)
      Keiji Nagai, Zhi Song
    • Organizer
      The International Symposium on Statistical Analysis of Spatio-Temporal Data
    • Place of Presentation
      鎌倉商工会議所(鎌倉)
    • Year and Date
      2010-11-05
    • Data Source
      KAKENHI-PROJECT-21530212
  • [Presentation] Asymptotics of sequential tests for some markov chains via convergence to diffusion2009

    • Author(s)
      Nagai, K.
    • Organizer
      Russian-Japan Symposium on Stochastic Analysis of the Advanced Statistical Models
    • Place of Presentation
      ステクロフ研究所 (ロシア)
    • Year and Date
      2009-09-16
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Asymptotics of sequential tests for some markov chains via convergence to diffusion2009

    • Author(s)
      Nagai, K.
    • Organizer
      Russian-Japan Symposium on Stochastic Analysis of the Advanced Statistical Models
    • Place of Presentation
      ステクロフ研究所(ロシア)
    • Year and Date
      2009-09-16
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Asymptotics of sequential tests for some Markov chains viaconvergence to diffusion2009

    • Author(s)
      永井圭二
    • Organizer
      Russian-Japan Symposium on Stochastic Analysis of the Advanced Statistical Models
    • Place of Presentation
      モスクワ
    • Year and Date
      2009-09-16
    • Data Source
      KAKENHI-PROJECT-21530212
  • [Presentation] Cox proportional Hazard Model with Staggered Entry in Real Time2009

    • Author(s)
      永井圭二・宋智
    • Organizer
      時空間統計解析その理論と応用
    • Place of Presentation
      宇治市生涯学習センター
    • Year and Date
      2009-11-20
    • Data Source
      KAKENHI-PROJECT-21530198
  • [Presentation] Asymptotics of sequential tests for some markov chains via convergence to diffusion2009

    • Author(s)
      Keiji Nagai
    • Organizer
      Russian-Japan Symposium on Stochastic Analysis of the Advanced Statistical Models
    • Place of Presentation
      モスクワ
    • Year and Date
      2009-06-07
    • Data Source
      KAKENHI-PROJECT-21530212
  • [Presentation] Prediction of failure and IPO of ventures in multiplicative intensity mode1 with time varying covariates2009

    • Author(s)
      Nagai, K.
    • Organizer
      関西計量経済学研究会~
    • Place of Presentation
      神戸大学
    • Year and Date
      2009-01-10
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Prediction of failure and IPO of ventures in multiplicative intensity model with time varying covariates2009

    • Author(s)
      Nagai, K., Z. Song
    • Organizer
      関西計量経済学研究会
    • Place of Presentation
      神戸大学
    • Year and Date
      2009-01-10
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Asymptotics of sequential tests for some Markov chains via convergence to diffusion2008

    • Author(s)
      Nagai, K., K. Hitomi, Y. Nishiyama
    • Organizer
      Recent Developments in Statistics and Econometrics in Honor of H. Akaike
    • Place of Presentation
      Shiran-kaikan, Kyoto University
    • Year and Date
      2008-11-06
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] 単位根と分岐過程のcriticality の逐次検定2008

    • Author(s)
      永井圭二、人見光太郎、西山慶彦
    • Organizer
      日本統計学会
    • Place of Presentation
      成城大学
    • Year and Date
      2008-03-01
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Asymptotics of sequential tests for some Markov chain svia convergence to diffusion2008

    • Author(s)
      Nagai, K.
    • Organizer
      Recent Developments in Statistics and Econometric~ In Honor of H. Akaike~
    • Place of Presentation
      Shiran- kaikan, Kyoto University
    • Year and Date
      2008-11-06
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Asymptotics of sequential tests for some Markov chains via convergence to diffusion2008

    • Author(s)
      永井圭二
    • Organizer
      Recent Developments in Statistics and Econometrics
    • Place of Presentation
      In Honor of H. Akaike 京都大学
    • Year and Date
      2008-11-06
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Presentation] 単位根と分岐過程のcriticalityの逐次検定2008

    • Author(s)
      永井圭二
    • Organizer
      日本統計学会
    • Place of Presentation
      成城大学
    • Year and Date
      2008-03-01
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Sequential Unit Root Test Waseda Seminar on Time Series and Statistical Finance2007

    • Author(s)
      Keiji Nagai
    • Place of Presentation
      Waseda University
    • Year and Date
      2007-11-02
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Presentation] Nonparametric Estimation of Multivariate Volatilities for Non-synchronous Observations2007

    • Author(s)
      永井圭二, 宋明子
    • Organizer
      日本統計関連学会連合大会
    • Place of Presentation
      神戸大学
    • Year and Date
      2007-09-08
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Sequential Unit Root Test2007

    • Author(s)
      Keiji Nagai
    • Organizer
      Russian-Japan Workshop Complex Stochastic Models: Asymptotics and Applications
    • Place of Presentation
      Steklov Institute Moskow
    • Year and Date
      2007-06-04
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Sequential Unit Root Test2007

    • Author(s)
      Keiji Nagai
    • Organizer
      Waseda Seminar on Time Series and Statistical Finance
    • Place of Presentation
      Waseda University
    • Year and Date
      2007-11-02
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Presentation] On Stopping Rules of a Sequential Test in Continuous Time2007

    • Author(s)
      永井圭二
    • Organizer
      研究集会「時空間現象データに対する統計科学モデルの構築及び解析に関する組織的研究」
    • Place of Presentation
      岡山国際交流センター
    • Year and Date
      2007-11-29
    • Data Source
      KAKENHI-PROJECT-18203014
  • [Presentation] Sequential Unit Root Test2006

    • Author(s)
      Nagai, K., K. Hitomi, Y. Nishiyama
    • Organizer
      Russian-Japan Workshop Complex Stochastic Models : Asymptotics and Applications
    • Place of Presentation
      Steklov Institute, Moscow, Russia
    • Year and Date
      2006-06-04
    • Data Source
      KAKENHI-PROJECT-19530179
  • [Presentation] Nonparametric Estimation for Quadratic Covariation of Two-dimensional Diffusion under Nonsychronous High Frequency Observations

    • Author(s)
      Keiji Nagai
    • Organizer
      Institute of Mathematical Statistics, Asia Pacific Rim Meeting
    • Place of Presentation
      Tsukuba, Japan
    • Invited
    • Data Source
      KAKENHI-PROJECT-24530226
  • [Presentation] A Nonparametric test for the existence of moments

    • Author(s)
      Kohtaro Hitomi, Yoshihiko Nishiyama, Keiji Nagai
    • Organizer
      2009年度日本統計学会春季大会発表論文
    • Data Source
      KAKENHI-PROJECT-18203014
  • 1.  NISHIYAMA Yoshihiko (30283378)
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    # of Collaborated Products: 26 results
  • 2.  HITOMI Kotaro (00283680)
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    # of Collaborated Products: 0 results
  • 13.  SHIMIZU Kunio (60110946)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 14.  NISHII Ryuei (40127684)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 1 results
  • 15.  KISHINO Hirohisa (00141987)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 16.  KURIHARA Kouji (20170087)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 17.  YOSHIDA Atsushi (60240272)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 18.  KUBOKAWA Tatsuya (20195499)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 19.  FUKUCHI Jun=ichiro (00274043)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 20.  MATSUDA Yasumasa (10301590)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 21.  MARUYAMA Yuzo (30304728)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 22.  TAKAHASHI Kunihiko (50323259)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 23.  IDA Takanori (60278794)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 24.  OKUI Ryo (20563480)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results

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