@article{oai:tsukuba.repo.nii.ac.jp:00009178,
 author = {酒井, 泰弘 and Sakai, Yasuhiro},
 journal = {筑波大学経済学論集, The University of Tsukuba economic review},
 month = {Mar},
 pages = {1--38},
 title = {寡占,情報および厚生 : 企業数変化の効果},
 volume = {20},
 year = {1988}
}