{"created":"2021-03-01T06:43:25.088403+00:00","id":25457,"links":{},"metadata":{"_buckets":{"deposit":"ca62ece8-d444-4924-bd26-1699cac2af32"},"_deposit":{"id":"25457","owners":[],"pid":{"revision_id":0,"type":"depid","value":"25457"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00025457","sets":["27:2466:2467:2557","9:504:2469:2558"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"A Study on Economic Effects of Forest Road Construction"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1994","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"174","bibliographicPageStart":"167","bibliographicVolumeNumber":"92","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"林道開設による経済的効果を計測するために，長方形の林地を仮定し，便益を「素材価額－集材費」の増大分，費用を「林道開設費＋林道維持費」として，内部収益率を計算した。結果は6.9％となり投資対象としてかなり好ましいと判断できる。しかしながら全国森林計画の林道整備計画に対する進捗率50.0％であり，投資対象としてあまり魅力がないのが現実である。そこで，さまざまな条件を想定して内部収益率を再計算することによって，a．内部収益率を最大にするような年開設距離が短いこと，b．森林の零細・分散所有が開設進度を遅らせること，c．費用に跡地への造林費用を考慮するとさらに内部収益率は小さくなること，が低い進捗率を説明するものとしてあげることができた。","subitem_description_type":"Abstract"},{"subitem_description":"To measure economic effects of forest road construction, we calculate the internal rate of return (IRR) assuming that the hypothetical forest land is rectangular and that we can measure the benefit by the increase in the stumpage value, i.e., total timber value minus yarding cost, and the cost by forest road construction cost plus forest road maintenance cost. The IRR we calculate is 6.9%, which indicates that a forest road construction is a lucrative opportunity. In actuality, however, the progress rate, measured as the completed forest road construction divided by its plan in National Forest Plan is ONLY 50.0%, contradicting with our expectation. We recalculate the IRR under various conditions to find out which factors are essential in accounting for the low progress rate. We find the followings are important; a. a slower forest road construction gives a better IRR. b. a petty and dispersed distribution of forest land ownership hinders the progess. c. IRR with reforestation cost is lower.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"54825","nameIdentifierScheme":"WEKO"}],"names":[{"name":"YASUMURA, Naoki"}]},{"nameIdentifiers":[{"nameIdentifier":"54826","nameIdentifierScheme":"WEKO"}],"names":[{"name":"NAGATA, Shin"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"610","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"The Tokyo University Forests"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学農学部（現在所属機関：本州製紙株式会社）"},{"subitem_text_value":"東京大学農学部"},{"subitem_text_value":"Faculty of Agriculture, The University of Tokyo. (Honshu Paper Co., Ltd.)"},{"subitem_text_value":"Faculty of Agriculture, The University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"安村, 直樹"}],"nameIdentifiers":[{"nameIdentifier":"54823","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"永田, 信"}],"nameIdentifiers":[{"nameIdentifier":"54824","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-09"}],"displaytype":"detail","filename":"esrh092009.pdf","filesize":[{"value":"502.8 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"esrh092009.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/25457/files/esrh092009.pdf"},"version_id":"52687608-9ad8-4708-a6da-a26eea308629"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"林道開設による経済的効果","subitem_subject_scheme":"Other"},{"subitem_subject":"内部収益率","subitem_subject_scheme":"Other"},{"subitem_subject":"インセンティブ","subitem_subject_scheme":"Other"},{"subitem_subject":"進捗率","subitem_subject_scheme":"Other"},{"subitem_subject":"Economic effects of forest road construction","subitem_subject_scheme":"Other"},{"subitem_subject":"Internal rate of return","subitem_subject_scheme":"Other"},{"subitem_subject":"Incentive","subitem_subject_scheme":"Other"},{"subitem_subject":"Progress rate","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"林道開設に伴う経済効果に関する考察","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"林道開設に伴う経済効果に関する考察"}]},"item_type_id":"4","owner":"1","path":["2558","2557"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-09-03"},"publish_date":"2014-09-03","publish_status":"0","recid":"25457","relation_version_is_last":true,"title":["林道開設に伴う経済効果に関する考察"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:03:42.164772+00:00"}