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  1. Does Previous Marijuana Use Increase the Use of Other Drugs: An Almost Ideal Demand System Approach

    Article • Advances in Economic Analysis & Policy, January 2017, De Gruyter

    Dr koichi yamaura

  2. Measuring Bilateral Market Power in International Markets of Vertically Differentiated Agricultural Commodities

    Article • Journal of Agricultural & Food Industrial Organization, January 2016, De Gruyter

    Tian Xia, Dr koichi yamaura