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) Alberto Alesina and Edward Glaeser and Bruce Sacerdote,Why Doesn't the US Have a European-Style Welfare System?,,,National Bureau of Economic Research,2001-10,,,,https://cir.nii.ac.jp/crid/1360294648019144448,https://doi.org/10.3386/w8524