{"id":21544,"date":"2025-10-03T08:19:06","date_gmt":"2025-10-03T06:19:06","guid":{"rendered":"https:\/\/www.uni.lu\/fdef-en\/?post_type=events&#038;p=21544"},"modified":"2025-10-03T10:50:37","modified_gmt":"2025-10-03T08:50:37","slug":"dem-research-seminar-with-andrei-kostyrka-universite-du-luxembourg-l","status":"publish","type":"events","link":"https:\/\/www.uni.lu\/fdef-en\/events\/dem-research-seminar-with-andrei-kostyrka-universite-du-luxembourg-l\/","title":{"rendered":"DEM Research Seminar with Andre\u00ef Kostyrka, Universit\u00e9 du Luxembourg, L"},"content":{"rendered":"\n<section class=\"wp-block-unilux-blocks-free-section section\"><div class=\"container xl:max-w-screen-xl\">\n<p><\/p>\n\n\n\n<ul class=\"wp-block-unilux-blocks-custom-buttons btn-list\"><li class=\"wp-block-unilux-blocks-custom-button\"    aria-disabled=\"false\"\n    >\n    <a\n        role=\"link\"\n        aria-disabled=\"false\"\n                    href=\"https:\/\/www.eventbrite.fr\/e\/dem-research-seminar-with-andrei-kostyrka-university-of-luxembourg-registration-1765542317599?aff=oddtdtcreator\"\n                target=\"_self\"\n        class=\"btn btn--primary\"\n            >Register<\/a>\n<\/li>\n\n\n<li class=\"wp-block-unilux-blocks-custom-button\"    aria-disabled=\"false\"\n    >\n    <a\n        role=\"link\"\n        aria-disabled=\"false\"\n                    href=\"https:\/\/www.uni.lu\/fdef-en\/calendar?post_type=events&#038;p=21544&#038;calendar\"\n                target=\"_self\"\n        class=\"btn btn--secondary\"\n            >Add to calendar<\/a>\n<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Extrapolated empirical likelihood as a solution \u00a0to the convex-hull-violation problem<\/strong> <\/p>\n\n\n\n<p><strong>Abstract<\/strong><\/p>\n\n\n\n<p>Empirical likelihood (EL) breaks down when the hypothesised mean falls outside the convex hull of the sample. We develop two splicing schemes, which we call extrapolated EL (ExEL), that extend the log-EL ratio beyond the convex hull while leaving it unchanged in a user-specified interior region. The first scheme, ExEL1, continues EL past a data-driven cut-off via its local quadratic (Taylor) expansion. The second scheme, ExEL2, smoothly splices EL to its global quadratic Wald approximation using a convex bridge. Both methods extend naturally to multiple dimensions by radial reduction. In simulations with small samples \u2013 where convex-hull violations are common \u2013 ExEL remains well-behaved and allows researchers to distinguish between mild and severe violations. Furthermore, it has nice inferential properties, yielding accurate coverage probabilities with bootstrap calibration.<\/p>\n\n\n\n<p><strong>Language<\/strong><\/p>\n\n\n\n<p>English<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>This is a free seminar. Registration is mandatory.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":99,"featured_media":10251,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"featured_image_focal_point":[],"show_featured_caption":false,"ulux_newsletter_groups":"","uluxPostTitle":"","uluxPrePostTitle":"","_trash_the_other_posts":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"event_start_date":"2025-11-11 13:00:00","event_end_date":"2025-11-11 14:00:00","event_speaker_name":"Andre\u00ef Kostyrka","event_speaker_link":"https:\/\/www.uni.lu\/fdef-en\/people\/andrei-kostyrka\/","event_is_online":false,"event_location":"Universit\u00e9 du Luxembourg - Campus Weicker ","event_street":"4, rue Alphonse Weicker Room C117","event_location_link":"https:\/\/www.uni.lu\/en\/about\/campuses\/weicker-building\/","event_zip_code":"2721","event_city":"Luxembourg","event_country":"Luxembourg"},"events-topic":[298],"events-type":[323,322,315],"organisation":[138,101],"authorship":[99],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v22.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>DEM Research Seminar with Andre\u00ef Kostyrka, Universit\u00e9 du Luxembourg, L - FDEF events I Uni.lu<\/title>\n<meta name=\"description\" content=\"Extrapolated empirical likelihood as a solution \u00a0to the convex-hull-violation problem Abstract Empirical likelihood (EL) breaks down when the hypothesised\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.uni.lu\/fdef-en\/events\/dem-research-seminar-with-andrei-kostyrka-universite-du-luxembourg-l\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DEM Research Seminar with Andre\u00ef Kostyrka, Universit\u00e9 du Luxembourg, L\" \/>\n<meta property=\"og:description\" content=\"Extrapolated empirical likelihood as a solution \u00a0to the convex-hull-violation problem Abstract Empirical likelihood (EL) breaks down when the hypothesised\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.uni.lu\/fdef-en\/events\/dem-research-seminar-with-andrei-kostyrka-universite-du-luxembourg-l\/\" \/>\n<meta property=\"og:site_name\" content=\"FDEF EN\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/uni.FDEF.lu\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-03T08:50:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/3\/2024\/05\/Research-Seminar-DEM.png\" \/>\n\t<meta property=\"og:image:width\" content=\"650\" \/>\n\t<meta property=\"og:image:height\" content=\"665\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.uni.lu\/fdef-en\/events\/dem-research-seminar-with-andrei-kostyrka-universite-du-luxembourg-l\/\",\"url\":\"https:\/\/www.uni.lu\/fdef-en\/events\/dem-research-seminar-with-andrei-kostyrka-universite-du-luxembourg-l\/\",\"name\":\"DEM Research Seminar with Andre\u00ef Kostyrka, Universit\u00e9 du Luxembourg, L - 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