@techreport{oai:tsukuba.repo.nii.ac.jp:00022818,
 author = {奥島, 真一郎 and OKUSHIMA, Shinichiro and TAMURA, Makoto},
 month = {Jun},
 title = {A Double Calibration Approach to the Estimation of Technological Change},
 year = {2006},
 yomi = {オクシマ, シンイチロウ}
}