{"id":"https://openalex.org/W4416018076","doi":"https://doi.org/10.1145/3746252.3761505","title":"Stratified Expert Cloning for Retention-Aware Recommendation at Scale","display_name":"Stratified Expert Cloning for Retention-Aware Recommendation at Scale","publication_year":2025,"publication_date":"2025-11-08","ids":{"openalex":"https://openalex.org/W4416018076","doi":"https://doi.org/10.1145/3746252.3761505"},"language":null,"primary_location":{"id":"doi:10.1145/3746252.3761505","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3746252.3761505","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 34th ACM International Conference on Information and Knowledge Management","raw_type":"proceedings-article"},"type":"conference-paper","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/A5026298162","display_name":"Chengzhi Lin","orcid":"https://orcid.org/0000-0002-8049-3989"},"institutions":[{"id":"https://openalex.org/I4401726859","display_name":"Kuaishou (China)","ror":"https://ror.org/0258as409","country_code":null,"type":"company","lineage":["https://openalex.org/I4401726859"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Chengzhi Lin","raw_affiliation_strings":["Kuaishou Technology, Beijing, China"],"raw_orcid":"https://orcid.org/0000-0002-8049-3989","affiliations":[{"raw_affiliation_string":"Kuaishou Technology, Beijing, China","institution_ids":["https://openalex.org/I4401726859"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5111282646","display_name":"Anyin Xie","orcid":"https://orcid.org/0009-0005-8016-9598"},"institutions":[{"id":"https://openalex.org/I20231570","display_name":"Peking University","ror":"https://ror.org/02v51f717","country_code":"CN","type":"education","lineage":["https://openalex.org/I20231570"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Annan Xie","raw_affiliation_strings":["Peking University, Beijing, China"],"raw_orcid":"https://orcid.org/0009-0005-8016-9598","affiliations":[{"raw_affiliation_string":"Peking University, Beijing, China","institution_ids":["https://openalex.org/I20231570"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100600807","display_name":"Shuchang Liu","orcid":"https://orcid.org/0000-0002-1440-911X"},"institutions":[{"id":"https://openalex.org/I4401726859","display_name":"Kuaishou (China)","ror":"https://ror.org/0258as409","country_code":null,"type":"company","lineage":["https://openalex.org/I4401726859"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Shuchang Liu","raw_affiliation_strings":["Kuaishou Technology, Beijing, China"],"raw_orcid":"https://orcid.org/0000-0002-1440-911X","affiliations":[{"raw_affiliation_string":"Kuaishou Technology, Beijing, China","institution_ids":["https://openalex.org/I4401726859"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012327483","display_name":"Wan\u2010Hsian Wang","orcid":"https://orcid.org/0009-0000-5773-7909"},"institutions":[{"id":"https://openalex.org/I4401726859","display_name":"Kuaishou (China)","ror":"https://ror.org/0258as409","country_code":null,"type":"company","lineage":["https://openalex.org/I4401726859"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Wuhong Wang","raw_affiliation_strings":["Kuaishou Technology, Beijing, China"],"raw_orcid":"https://orcid.org/0009-0000-5773-7909","affiliations":[{"raw_affiliation_string":"Kuaishou Technology, Beijing, China","institution_ids":["https://openalex.org/I4401726859"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5103242419","display_name":"Chuyuan Wang","orcid":"https://orcid.org/0009-0006-2977-9611"},"institutions":[{"id":"https://openalex.org/I4401726859","display_name":"Kuaishou (China)","ror":"https://ror.org/0258as409","country_code":null,"type":"company","lineage":["https://openalex.org/I4401726859"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Chuyuan Wang","raw_affiliation_strings":["Kuaishou Technology, Beijing, China"],"raw_orcid":"https://orcid.org/0009-0006-2977-9611","affiliations":[{"raw_affiliation_string":"Kuaishou Technology, Beijing, China","institution_ids":["https://openalex.org/I4401726859"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5035305997","display_name":"Yongq Li","orcid":"https://orcid.org/0009-0005-2153-6722"},"institutions":[{"id":"https://openalex.org/I4401726859","display_name":"Kuaishou (China)","ror":"https://ror.org/0258as409","country_code":null,"type":"company","lineage":["https://openalex.org/I4401726859"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yongqi Liu","raw_affiliation_strings":["Kuaishou Technology, Beijing, China"],"raw_orcid":"https://orcid.org/0009-0005-2153-6722","affiliations":[{"raw_affiliation_string":"Kuaishou Technology, Beijing, China","institution_ids":["https://openalex.org/I4401726859"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5020615530","display_name":"Han Li","orcid":"https://orcid.org/0009-0000-9801-9292"},"institutions":[{"id":"https://openalex.org/I4401726859","display_name":"Kuaishou (China)","ror":"https://ror.org/0258as409","country_code":null,"type":"company","lineage":["https://openalex.org/I4401726859"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Han Li","raw_affiliation_strings":["Kuaishou Technology, Beijing, China"],"raw_orcid":"https://orcid.org/0009-0000-9801-9292","affiliations":[{"raw_affiliation_string":"Kuaishou Technology, Beijing, China","institution_ids":["https://openalex.org/I4401726859"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.40320136,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"5871","last_page":"5878"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.7996000051498413,"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":0.7996000051498413,"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":0.0771000012755394,"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":0.016899999231100082,"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/reinforcement-learning","display_name":"Reinforcement learning","score":0.527400016784668},{"id":"https://openalex.org/keywords/recommender-system","display_name":"Recommender system","score":0.5224000215530396},{"id":"https://openalex.org/keywords/entropy","display_name":"Entropy (arrow of time)","score":0.4634000062942505},{"id":"https://openalex.org/keywords/snapshot","display_name":"Snapshot (computer storage)","score":0.4262000024318695},{"id":"https://openalex.org/keywords/the-internet","display_name":"The Internet","score":0.39969998598098755},{"id":"https://openalex.org/keywords/selection","display_name":"Selection (genetic algorithm)","score":0.373199999332428}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7272999882698059},{"id":"https://openalex.org/C97541855","wikidata":"https://www.wikidata.org/wiki/Q830687","display_name":"Reinforcement learning","level":2,"score":0.527400016784668},{"id":"https://openalex.org/C557471498","wikidata":"https://www.wikidata.org/wiki/Q554950","display_name":"Recommender system","level":2,"score":0.5224000215530396},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.513700008392334},{"id":"https://openalex.org/C106301342","wikidata":"https://www.wikidata.org/wiki/Q4117933","display_name":"Entropy (arrow of time)","level":2,"score":0.4634000062942505},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.4311999976634979},{"id":"https://openalex.org/C55282118","wikidata":"https://www.wikidata.org/wiki/Q252683","display_name":"Snapshot (computer storage)","level":2,"score":0.4262000024318695},{"id":"https://openalex.org/C110875604","wikidata":"https://www.wikidata.org/wiki/Q75","display_name":"The Internet","level":2,"score":0.39969998598098755},{"id":"https://openalex.org/C81917197","wikidata":"https://www.wikidata.org/wiki/Q628760","display_name":"Selection (genetic algorithm)","level":2,"score":0.373199999332428},{"id":"https://openalex.org/C183003079","wikidata":"https://www.wikidata.org/wiki/Q1000371","display_name":"Personalization","level":2,"score":0.337799996137619},{"id":"https://openalex.org/C2986087404","wikidata":"https://www.wikidata.org/wiki/Q15946010","display_name":"Online learning","level":2,"score":0.304500013589859},{"id":"https://openalex.org/C2778755073","wikidata":"https://www.wikidata.org/wiki/Q10858537","display_name":"Scale (ratio)","level":2,"score":0.288100004196167},{"id":"https://openalex.org/C77967617","wikidata":"https://www.wikidata.org/wiki/Q4677561","display_name":"Active learning (machine learning)","level":2,"score":0.25609999895095825}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/3746252.3761505","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3746252.3761505","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 34th ACM International Conference on Information and Knowledge Management","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W2026920110","https://openalex.org/W2054141820","https://openalex.org/W2433963325","https://openalex.org/W2723293840","https://openalex.org/W2726080841","https://openalex.org/W2788862220","https://openalex.org/W2905173465","https://openalex.org/W2953586472","https://openalex.org/W2955106599","https://openalex.org/W2963323306","https://openalex.org/W3138773240","https://openalex.org/W4324312897","https://openalex.org/W4367310822","https://openalex.org/W4386730581","https://openalex.org/W4394007749","https://openalex.org/W4399554003","https://openalex.org/W4401417109"],"related_works":[],"abstract_inverted_index":{"User":[0],"retention":[1,80,98],"is":[2],"critical":[3],"in":[4,147],"large-scale":[5],"recommender":[6],"systems,":[7],"significantly":[8],"influencing":[9],"online":[10,116],"platforms'":[11],"long-term":[12,38],"success.":[13],"Existing":[14],"methods":[15],"typically":[16],"focus":[17],"on":[18,94,119,150],"short-term":[19],"engagement,":[20],"neglecting":[21],"the":[22,151],"evolving":[23],"dynamics":[24],"of":[25,129,131,143],"user":[26],"behaviors":[27],"over":[28,158],"time.":[29],"Reinforcement":[30],"learning":[31,57],"(RL)":[32],"methods,":[33],"though":[34],"promising":[35],"for":[36],"optimizing":[37],"rewards,":[39],"face":[40],"challenges":[41],"like":[42],"delayed":[43],"credit":[44],"assignment":[45],"and":[46,97,100,109,115,124,145],"sample":[47],"inefficiency.":[48],"We":[49],"introduce":[50],"Stratified":[51],"Expert":[52],"Cloning":[53],"(SEC),":[54],"an":[55],"imitation":[56],"framework":[58],"that":[59],"leverages":[60],"abundant":[61],"interaction":[62],"data":[63],"from":[64],"high-retention":[65],"users":[66,89,132],"to":[67,77,86,105],"learn":[68],"robust":[69],"policies.":[70],"SEC":[71],"incorporates:":[72],"1)":[73],"multi-level":[74],"expert":[75,84],"stratification":[76],"model":[78],"diverse":[79],"behaviors;":[81],"2)":[82],"adaptive":[83],"selection":[85],"dynamically":[87],"match":[88],"with":[90,127],"appropriate":[91],"policies":[92],"based":[93],"their":[95],"state":[96],"history;":[99],"3)":[101],"action":[102],"entropy":[103],"regularization":[104],"enhance":[106],"recommendation":[107],"diversity":[108],"policy":[110],"generalization.":[111],"Extensive":[112],"offline":[113],"evaluations":[114],"A/B":[117],"tests":[118],"major":[120],"video":[121],"platforms":[122,153],"(Kuaishou":[123],"Kuaishou":[125],"Lite)":[126],"hundreds":[128],"millions":[130],"validate":[133],"SEC's":[134],"effectiveness.":[135],"Results":[136],"show":[137],"substantial":[138],"improvements,":[139],"achieving":[140],"cumulative":[141],"lifts":[142],"0.098%":[144],"0.122%":[146],"active":[148,162],"days":[149],"two":[152],"respectively,":[154],"each":[155],"translating":[156],"into":[157],"200,000":[159],"additional":[160],"daily":[161],"users.":[163]},"counts_by_year":[],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-11-08T00:00:00"}