{"created":"2021-03-01T06:34:32.270717+00:00","id":17230,"links":{},"metadata":{"_buckets":{"deposit":"bf3938e5-9f45-4bd6-8e7b-78f91d98b7fd"},"_deposit":{"id":"17230","owners":[],"pid":{"revision_id":0,"type":"depid","value":"17230"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00017230","sets":["55:864:962:966","9:504:867:964:967"]},"item_4_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"H Statistics and Competitiveness of the Markets(<Special issue>Economic Law and Industrial Organization)"}]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2005-03-10","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"3-4","bibliographicPageEnd":"51","bibliographicPageStart":"43","bibliographicVolumeNumber":"56","bibliographic_titles":[{"bibliographic_title":"社會科學研究"}]}]},"item_4_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"市場競争度を計る指標として用いられているH統計量について再考する.H統計量は,その市場が独占市場であることを否定する指標としては有用であるが,この数値の大小と競争度の間にはシステマチックな関係がないことを明らかにし,この指標を用いた実証分析は再検討の必要があることを明らかにする.","subitem_description_type":"Abstract"},{"subitem_description":"This paper reexamines the implications of H statistics, which are widely used as measures of competitiveness. Some researchers used H as a wrong way. They insisted that H<0 if and only if the market is monopoly and that H = 1 if and only if the market is perfectly competitive. I show that both are wrong. H can be negative or can be positive but strictly smaller one even in perfectly competitive markets. I also show simple examples illustrating that H statistics are related to the competitiveness.","subitem_description_type":"Abstract"}]},"item_4_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"107809","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Matsumura, Toshihiro"}]}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学社会科学研究所"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00108966","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03873307","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"300","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"Institute of Social Science, The University of Tokyo"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学社会科学研究所"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"松村, 敏弘"}],"nameIdentifiers":[{"nameIdentifier":"107808","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":"2017-06-26"}],"displaytype":"detail","filename":"KJ00004192086.pdf","filesize":[{"value":"583.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"KJ00004192086.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/17230/files/KJ00004192086.pdf"},"version_id":"e81d3841-0586-4ce0-8bc3-b9d8922fd272"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"H統計量","subitem_subject_scheme":"Other"},{"subitem_subject":"競争度","subitem_subject_scheme":"Other"},{"subitem_subject":"独占禁止法","subitem_subject_scheme":"Other"},{"subitem_subject":"完全競争","subitem_subject_scheme":"Other"},{"subitem_subject":"独占","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":"H統計量と市場の競争度","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"H統計量と市場の競争度"}]},"item_type_id":"4","owner":"1","path":["966","967"],"pubdate":{"attribute_name":"公開日","attribute_value":"2008-09-19"},"publish_date":"2008-09-19","publish_status":"0","recid":"17230","relation_version_is_last":true,"title":["H統計量と市場の競争度"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T03:55:51.334068+00:00"}