@techreport{oai:tsukuba.repo.nii.ac.jp:00022765,
 author = {Tsung-ming, Yeh and 葉, 聰明 and Hoshino, Yasuo and 星野, 靖雄},
 month = {},
 title = {Productivity and operating performance of Japanese merging firms : keiretsu-related and independent mergers},
 year = {2001}
}