選別・選択段階における他者への同調効果を考慮した電気自動車普及要因に関する研究  [in Japanese] STUDY ON PROMOTING FACTOR OF ELECTRIC VEHICLE WITH SOCIAL CONFORMITY IN CHOICE SET FORMING AND CHOICE STEP  [in Japanese]

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Abstract

CO<sub>2</sub>排出原単位の小さい電気自動車は,車両性能や価格面で普及に関する課題を抱えている.本研究では,電気自動車の普及要因を,実証分析によって明らかにすることを目的とする.電気自動車購入意識に関するアンケート調査に基づいて,自動車の購入に至るまでの選択肢集合形成と選択の多段階性,他者の行動結果が意思決定に及ぼす社会的同調効果の存在,およびそれらの選好の異質性を同時に考慮した車種選択モデルを開発した.モデル推定の結果,選択肢集合形成段階と車種選択段階の両方において,社会的同調効果が存在すること,およびそれら両段階において選好の異質性が存在することを明らかにした.また,推定したモデルを用いた感度分析によって,電気自動車の普及要因を明らかにし,電気自動車の普及促進施策の提案を行った.

Passenger cars are major source of CO<sub>2</sub> emission in Japan. The promotion of electric vehicles (EVs) would contribute to CO<sub>2</sub> reduction. The purpose of this study is to clarify the promoting factors of EVs, and to propose effective EVs promoting policies. A questionnaire survey in Tottori Prefecture was conducted through a Web survey. The collected data was analyzed by using a new vehicle-type choice model, which can consider social conformity, the choice set forming, and heterogeneities in their preference. The estimated model gave an empirical evidence for the effectiveness of the proposed model. Moreover, the estimation results concerning the membership probability clarified that household characteristics were significant factors to explain inter-personal heterogeneity. Social conformity was significant not only for the choice set forming, but also for the vehicle-type choice.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 68(5), I_691-I_699, 2012

    Japan Society of Civil Engineers

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