@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042087,
 author = {Omori, Yasuhiro and Koji, Miyawaki},
 month = {Sep},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {Tobit Model with Covariate Dependent Thresholds},
 year = {2008}
}