@techreport{oai:kwansei.repo.nii.ac.jp:00028348,
 author = {Block, Jörn and Fisch, Christian and Ikeuchi, Kenta and 加藤, 雅俊 and Block, Jörn and Fisch, Christian and Ikeuchi, Kenta and Kato, Masatoshi},
 issue = {200},
 month = {Nov},
 title = {Trademarks as an indicator of regional innovation : Evidence from Japanese prefectures},
 year = {2019}
}