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) Aidan R. Vining and Anthony E. Boardman,Ownership versus competition: Efficiency in public enterprise,Public Choice,0048-5829,Springer Science and Business Media LLC,1992-03,73,2,205-239,https://cir.nii.ac.jp/crid/1361699995750600320,https://doi.org/10.1007/bf00145092