Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KUSAKABE Yoshihiro,Software Piracy and Hardware Taxation System: Digital Information Goods with Network Externalities,Studies in Regional Science,02876256,JAPAN SECTION OF THE REGIONAL SCIENCE ASSOCIATION INTERNATIONAL,2001,32,3,265-278,https://cir.nii.ac.jp/crid/1390001204432238720,https://doi.org/10.2457/srs.32.3_265