{"id":"https://openalex.org/W2511414107","doi":"https://doi.org/10.1145/2959100.2959176","title":"Contrasting Offline and Online Results when Evaluating Recommendation Algorithms","display_name":"Contrasting Offline and Online Results when Evaluating Recommendation Algorithms","publication_year":2016,"publication_date":"2016-09-01","ids":{"openalex":"https://openalex.org/W2511414107","doi":"https://doi.org/10.1145/2959100.2959176","mag":"2511414107"},"language":"en","primary_location":{"id":"doi:10.1145/2959100.2959176","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2959100.2959176","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 10th ACM Conference on Recommender Systems","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5103555892","display_name":"Marco Rossetti","orcid":null},"institutions":[{"id":"https://openalex.org/I66752286","display_name":"University of Milano-Bicocca","ror":"https://ror.org/01ynf4891","country_code":"IT","type":"education","lineage":["https://openalex.org/I66752286"]}],"countries":["IT"],"is_corresponding":true,"raw_author_name":"Marco Rossetti","raw_affiliation_strings":["University of Milano-Bicocca, Milan, Italy"],"affiliations":[{"raw_affiliation_string":"University of Milano-Bicocca, Milan, Italy","institution_ids":["https://openalex.org/I66752286"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5020281960","display_name":"Fabio Stella","orcid":"https://orcid.org/0000-0002-1394-0507"},"institutions":[{"id":"https://openalex.org/I66752286","display_name":"University of Milano-Bicocca","ror":"https://ror.org/01ynf4891","country_code":"IT","type":"education","lineage":["https://openalex.org/I66752286"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Fabio Stella","raw_affiliation_strings":["University of Milano-Bicocca, Milan, Italy"],"affiliations":[{"raw_affiliation_string":"University of Milano-Bicocca, Milan, Italy","institution_ids":["https://openalex.org/I66752286"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5039093142","display_name":"Markus Zanker","orcid":"https://orcid.org/0000-0002-4805-5516"},"institutions":[{"id":"https://openalex.org/I171543936","display_name":"Free University of Bozen-Bolzano","ror":"https://ror.org/012ajp527","country_code":"IT","type":"education","lineage":["https://openalex.org/I171543936"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Markus Zanker","raw_affiliation_strings":["Free University of Bozen-Bolzano, Bolzano, Italy"],"affiliations":[{"raw_affiliation_string":"Free University of Bozen-Bolzano, Bolzano, Italy","institution_ids":["https://openalex.org/I171543936"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5103555892"],"corresponding_institution_ids":["https://openalex.org/I66752286"],"apc_list":null,"apc_paid":null,"fwci":16.6286,"has_fulltext":false,"cited_by_count":94,"citation_normalized_percentile":{"value":0.98985853,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":90,"max":100},"biblio":{"volume":null,"issue":null,"first_page":"31","last_page":"34"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12101","display_name":"Advanced Bandit Algorithms Research","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/1803","display_name":"Management Science and Operations Research"},"field":{"id":"https://openalex.org/fields/18","display_name":"Decision Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T11704","display_name":"Mobile Crowdsensing and Crowdsourcing","score":0.9977999925613403,"subfield":{"id":"https://openalex.org/subfields/1706","display_name":"Computer Science Applications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.823797345161438},{"id":"https://openalex.org/keywords/online-and-offline","display_name":"Online and offline","score":0.7348757386207581},{"id":"https://openalex.org/keywords/ranking","display_name":"Ranking (information retrieval)","score":0.6891434192657471},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.5710278749465942},{"id":"https://openalex.org/keywords/field","display_name":"Field (mathematics)","score":0.5703521370887756},{"id":"https://openalex.org/keywords/software-deployment","display_name":"Software deployment","score":0.5581706166267395},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5444220304489136},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.5073961615562439},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.4971611797809601},{"id":"https://openalex.org/keywords/online-algorithm","display_name":"Online algorithm","score":0.43489882349967957},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.3444886803627014},{"id":"https://openalex.org/keywords/software-engineering","display_name":"Software engineering","score":0.10235404968261719},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.07273748517036438}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.823797345161438},{"id":"https://openalex.org/C2780102126","wikidata":"https://www.wikidata.org/wiki/Q10928179","display_name":"Online and offline","level":2,"score":0.7348757386207581},{"id":"https://openalex.org/C189430467","wikidata":"https://www.wikidata.org/wiki/Q7293293","display_name":"Ranking (information retrieval)","level":2,"score":0.6891434192657471},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5710278749465942},{"id":"https://openalex.org/C9652623","wikidata":"https://www.wikidata.org/wiki/Q190109","display_name":"Field (mathematics)","level":2,"score":0.5703521370887756},{"id":"https://openalex.org/C105339364","wikidata":"https://www.wikidata.org/wiki/Q2297740","display_name":"Software deployment","level":2,"score":0.5581706166267395},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5444220304489136},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.5073961615562439},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.4971611797809601},{"id":"https://openalex.org/C196921405","wikidata":"https://www.wikidata.org/wiki/Q786431","display_name":"Online algorithm","level":2,"score":0.43489882349967957},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3444886803627014},{"id":"https://openalex.org/C115903868","wikidata":"https://www.wikidata.org/wiki/Q80993","display_name":"Software engineering","level":1,"score":0.10235404968261719},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.07273748517036438},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1145/2959100.2959176","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2959100.2959176","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 10th ACM Conference on Recommender Systems","raw_type":"proceedings-article"},{"id":"pmh:oai:alma.39UBZ_INST:11235256770001241","is_oa":false,"landing_page_url":"https://dl.acm.org/citation.cfm?doid=2959100.2959176","pdf_url":null,"source":{"id":"https://openalex.org/S4210197018","display_name":"View","issn_l":"2688-268X","issn":["2688-268X","2688-3988"],"is_oa":false,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"text"},{"id":"pmh:oai:boa.unimib.it:10281/132276","is_oa":false,"landing_page_url":"http://hdl.handle.net/10281/132276","pdf_url":null,"source":{"id":"https://openalex.org/S4306401259","display_name":"BOA (University of Milano-Bicocca)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I66752286","host_organization_name":"University of Milano-Bicocca","host_organization_lineage":["https://openalex.org/I66752286"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/conferenceObject"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":12,"referenced_works":["https://openalex.org/W786102430","https://openalex.org/W1597703625","https://openalex.org/W1971040550","https://openalex.org/W2018371603","https://openalex.org/W2042281163","https://openalex.org/W2078488685","https://openalex.org/W2108630796","https://openalex.org/W2113310024","https://openalex.org/W2138216384","https://openalex.org/W2150886314","https://openalex.org/W2162111811","https://openalex.org/W2163162311"],"related_works":["https://openalex.org/W2566006169","https://openalex.org/W2770234245","https://openalex.org/W2987774938","https://openalex.org/W632915154","https://openalex.org/W4229499248","https://openalex.org/W4378874356","https://openalex.org/W2369811061","https://openalex.org/W3089997100","https://openalex.org/W620798607","https://openalex.org/W3042122676"],"abstract_inverted_index":{"Most":[0],"evaluations":[1],"of":[2,43,76,95,101],"novel":[3],"algorithmic":[4],"contributions":[5],"assess":[6],"their":[7],"accuracy":[8,81],"in":[9,14],"predicting":[10],"what":[11],"was":[12],"withheld":[13],"an":[15],"offline":[16,27,51,80],"evaluation":[17,28,55,106],"scenario.":[18],"However,":[19],"several":[20],"doubts":[21],"have":[22],"been":[23],"raised":[24],"that":[25,73],"standard":[26],"practices":[29],"are":[30],"not":[31,109],"appropriate":[32],"to":[33,48],"select":[34],"the":[35,50,53,58,74,85,88,92,98,102],"best":[36],"algorithm":[37],"for":[38],"field":[39],"deployment.":[40],"The":[41],"goal":[42],"this":[44],"work":[45],"is":[46,108],"therefore":[47],"compare":[49],"and":[52],"online":[54,89],"methodology":[56,107],"with":[57,91],"same":[59,93],"study":[60,90],"participants,":[61],"i.e.":[62],"a":[63],"within":[64],"users":[65],"experimental":[66],"design.":[67],"This":[68],"paper":[69],"presents":[70],"empirical":[71],"evidence":[72],"ranking":[75],"algorithms":[77],"based":[78],"on":[79],"measurements":[82],"clearly":[83],"contradicts":[84],"results":[86],"from":[87],"set":[94],"users.":[96],"Thus":[97],"external":[99],"validity":[100],"most":[103],"commonly":[104],"applied":[105],"guaranteed.":[110]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":26},{"year":2023,"cited_by_count":8},{"year":2022,"cited_by_count":11},{"year":2021,"cited_by_count":11},{"year":2020,"cited_by_count":8},{"year":2019,"cited_by_count":12},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":6},{"year":2016,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}