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) "Kane, Robert F. and Lin, Ching-Yang",Up(and down)-skilling and directed technical change,Economics & Management Series,,,2019-04,,,,https://cir.nii.ac.jp/crid/1050282677922806656,