{"created":"2023-05-15T08:49:40.589470+00:00","id":112,"links":{},"metadata":{"_buckets":{"deposit":"59746907-32c0-4b81-af16-d0ba51561507"},"_deposit":{"created_by":2,"id":"112","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"112"},"status":"published"},"_oai":{"id":"oai:primaff.repo.nii.ac.jp:00000112","sets":["7:35"]},"author_link":["135","136"],"control_number":"112","item_10001_biblio_info_7":{"attribute_name":"bibliographic_information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2003-12-25","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"5","bibliographicPageEnd":"43","bibliographicPageStart":"1","bibliographic_titles":[{"bibliographic_title":"農林水産政策研究","bibliographic_titleLang":"ja"},{"bibliographic_title":"Journal of Agricultural Policy Research","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"表明選好法による選択実験では,属性の異なる商品や選択肢から回答者が最も望ましいと思うものを選択するか,順序をつける。そのため,注目する属性とその水準の設計がこれまでの主たる研究課題であった。他方,提示された商品群から「選ばない」というような選択外オプション(opt-out)もまた,計測結果に相当の影響を与えることが,近年,知られるようになり,新たな研究課題となってきている。\n代表的な選択外オプションとしては「買わない」と「いつものものを買う」の二つが挙げられる。本研究では,鶏卵の飼料に含まれるGMO含有率や生産情報を商品属性とし,サンプルを2分して,この2種類の選択外オプションの影響を比較分析する。なお,「いつものものを買う」という設問のあるサンプルでは,回答者が日常的に購入している鶏卵の情報を収集してコード化し,効用水準の推計に使用した。調査対象は英国消費者2000世帯であり,2001年11月〜12月にかけて調査を実施したものである。\n分析結果として,1仮想的な属性の卵,2代表的な属性の卵,さらに選択外オプションとして,3「買わない」と4「いつもの卵を買う」を比較した場合,消費者は4「いつもの卵を買う」というオプションを最もよく選び,次いで2実際の卵のオプションを選んだ。また,ランダムパラメータ・ロジットモデルの推計結果から,「いつもの卵を買う」方が,「買わない」というオプションを含むデータセットよりも,統計的に有意なパラメータの数が2倍程度多く推計された。したがって,これらのことから,プロファイルデザインの設計において,顕示選好データと現実的選択肢の利用の需要性が示唆された。\n計測結果の政策的含意については,遺伝子組換え飼料による卵は回避される傾向のあること,また,認証等の生産情報については,高付加価値の卵では評価されるが,低付加価値の卵ではあまり評価されないことが明らかになった。特に,後者については,価値の低い食品の場合,認証等の生産情報もあまり価値が無いことを意味しており,現在検討が進められているトレーサビリティの導入において,その費用対効果や商品選択の議論に対し,有益な視点を提供するものと思われる。","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"An important aspect of the design of stated preference choice experiments concerns the inclusion and format of an opt-out option in the hypothetical choice set(s) presented to the respondent. This paper assessed the implications from using alternative ‘opt-out’ formats in choice experiment studies. Two alternative opt-out formats have been widely used, the ‘do not buy’ format and the ‘buy/choose my current brand’ format. The decision of which format to use in different cases may have a substantial impact on the estimated parameters and welfare measures derived from choice experiment data. These impacts are examined in a data set from a choice experiment study on consumer resistance to genetically modified content in foods. A split sample design was used in which the first treatment was provided with the option of ‘not buying’ the good at all while the second with an option of ‘buying their usual brand’. Information over the actual purchasing habits of this latter group was collected and was incorporated into the estimation processes.\nThe results from each treatment were separately analyzed and the impact of alternative opt-out formats on response patterns and on the significance and stability of coefficients across treatment groups was examined. In addition, using findings from the experimental psychology literature the possible behavioral and psychological forces that are at work under each treatment were assessed. Finally, certain methodological implications for the design of choice experiment studies are drawn.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10001_identifier_registration":{"attribute_name":"identifier_registration","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.34444/00000105","subitem_identifier_reg_type":"JaLC"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"農林水産省 農林水産政策研究所","subitem_publisher_language":"ja"}]},"item_10001_source_id_11":{"attribute_name":"item_10001_source_id_11","attribute_value_mlt":[{"subitem_source_identifier":"AA11614280","subitem_source_identifier_type":"NCID"}]},"item_10001_source_id_9":{"attribute_name":"item_10001_source_id_9","attribute_value_mlt":[{"subitem_source_identifier":"1346-700X","subitem_source_identifier_type":"PISSN"}]},"item_10001_version_type_20":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"アンドレアス, コントレオン","creatorNameLang":"ja"},{"creatorName":"アンドレアス, コントレオン","creatorNameLang":"ja-Kana"},{"creatorName":"KONTOLEON, Andreas","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"135","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"矢部, 光保","creatorNameLang":"ja"},{"creatorName":"ヤベ, ミツヤス","creatorNameLang":"ja-Kana"},{"creatorName":"YABE, Mitsuyasu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"136","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":"2020-03-23"}],"displaytype":"detail","filename":"031225_sk05_01.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","license_note":"Copyright © 農林水産省 農林水産政策研究所\nPolicy Research Institute, Ministry of Agriculture, Forestry and Fisheries, Japan","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"031225_sk05_01.pdf","url":"https://primaff.repo.nii.ac.jp/record/112/files/031225_sk05_01.pdf"},"version_id":"2e3e5ea7-c967-46b0-94a0-a530723f92ee"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"item_resource_type","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"選択実験における「選択外」オプション形式の影響評価―食品における遺伝子組換え飼料含有率と生産情報に対する消費者選好―","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"選択実験における「選択外」オプション形式の影響評価―食品における遺伝子組換え飼料含有率と生産情報に対する消費者選好―","subitem_title_language":"ja"},{"subitem_title":"Assessing the Impacts of Alternative ‘Opt-out’ Formats in Choice Experiment Studies: Consumer Preferences for Genetically Modified Content and Production Information in Food","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"2","path":["35"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2020-03-23"},"publish_date":"2020-03-23","publish_status":"0","recid":"112","relation_version_is_last":true,"title":["選択実験における「選択外」オプション形式の影響評価―食品における遺伝子組換え飼料含有率と生産情報に対する消費者選好―"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2025-02-07T02:07:00.973869+00:00"}

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