@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042230,
 author = {Miyawaki, Koji and Omori, Yasuhiro and Hibiki, Akira},
 month = {Mar},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {A Discrete/Continuous Choice Model on the Nonconvex Budget Set},
 year = {2013}
}