著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Daniel Friedman and Ryan Oprea,A Continuous Dilemma,American Economic Review,0002-8282,American Economic Association,2012-02-01,102,1,337-363,https://cir.nii.ac.jp/crid/1361137046276196480,https://doi.org/10.1257/aer.102.1.337