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[文献書誌] Itoh, H., P.Tiwari, M.Doi: "An Analysis of Cargo Transportation Behaviour in Kita Kanto (Japan)"Internationl Journal of Transport Economics. Vol.29,No.3. 319-335 (2002)
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[文献書誌] Tiwari, P., M.Doi, H.Itoh: "A CGE Analysis of Potential Impact of IT on the Japanese Economy"Proceeding in The Fifth Conference on Global Economics Analysis. 8D-14-8D-33 (2002)
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[文献書誌] Tiwari, P., H.Itoh, M.Doi: "Shippers' Port and Carrier Selection Behaviour in China : A Discrete Choice Analysis"Maritime Economics & Logistics. Vol.5, No.1(March)(未定). (2003)
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[文献書誌] Kawakami, T., M.Doi: "Port Capital Formation and Economic Development in Japan : A Vector Autoregression Approach"Institute of Policy and Planning Sciences, University of Tsukuba, Discussion Paper Series. No.1010. 1-9 (2002)
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[文献書誌] Kawakami, T., P.Tiwari, M.Doi: "Welfare Effects of Trade Liberalization and Port Efficiency in China"Institute of Policy and Planning Sciences, University of Tsukuba, Discussion Paper Series. No.1026. 1-23 (2003)
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[文献書誌] 土井正幸, 河上哲, 伊藤秀和: "中国の港湾整備、管理・運営効率化と経済発展"港湾経済研究. No.41(3月)(未定). (2003)
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[文献書誌] 土井正幸, 坂下昇: "交通経済学"東洋経済新報社. 349 (2002)