著者名,タイトル,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Goldman,Experiments as instruments: Heterogeneous position effects in sponsored search auctions,EAI Endorsed Transactions on Serious Games,,,2016,3,11,,https://cir.nii.ac.jp/crid/1370288060326311686,