2024-03-28T12:01:52Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/800172020-12-22T17:13:12Zhdl_2115_79997hdl_2115_45742hdl_2115_62493奥付open access611北海道農業経済学会The Agricultural Economics Society of Hokkaido2020-03-31jpnotherNAhttp://hdl.handle.net/2115/800172185-1220AA12489661フロンティア農業経済研究The Frontiers of Agricultural Economic222https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/80017/1/22%282%29_06_okuduke.pdfapplication/pdf82.47 KB2020-03-31