@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042266,
 author = {Nakajima, Kentaro and Tabuchi, Takatoshi},
 month = {May},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {Estimating Interregional Utility Differentials},
 year = {2007}
}