RecSys Summer School 2023

Supported by ACM RecSys, ACM Europe Council, DDSA, and SIGCHI
June 12-16, 2023, Copenhagen, DK

Summer School on Recommender Systems

The 2023 RecSys summer school will be held from Monday June 12th to Friday June 16th in Copenhagen, Denmark. Leaders in the field will give lectures on the practice, research, and state of the art in recommender systems. The lectures are covering a broad range of topics from an algorithmic as well as an methodological perspective and will also include hands-on sessions.

The Summer School on Recommender Systems is supported by ACM RecSys, ACM Europe Council, DDSA, and SIGCHI. The RecSys Summer School follows previous summer schools on the same topic having taken place in Bilbao in 2006, Bolzano in 2017, Gothenburg in 2019, and Fortaleza in 2019.

Registration is closed. The summer school is sold out.

There are no more travel grants available.


SlotTimeMonday June 12Tuesday June 13Wednesday June 14Thursday June 15Friday June 16
18:45-10:15S3: Group recommendation, part 1 (Ludovico Boratto)S7: Knowledge-based recommendation (Pasquale Lops + Marco de Gemmis)S11: Media recommendation (Özlem Özgöbek + Daan Odijk)S15: Job recommendation (David Graus + Mesut Kaya)
10:15-10:45Coffee breakCoffee breakCoffee breakCoffee break
210:45-12:15S4: Group recommendation, part 2 (Ludovico Boratto)S8: Lab session (Marco Polignano)S12: Best practices for offline evaluation (Lien Michiels)S16: E-commerce (Humberto Corona)
313:15-14:45S1: Intro (Dietmar Jannach)S5: Perspectives on Evaluation (Christine Bauer + Martijn Willemsen)S9: Conversational recommendation (Cataldo Musto)S13: Fairness (Christine Bauer)S17: Multi-stakeholder recommendation (Robin Burke)
14:45-15:15Coffee breakCoffee breakCoffee breakCoffee breakCoffee break
415:15-16:45S2: Recommenders in the wild (Kim Falk + Morten Arngren)S6: Content-based filtering (Pasquale Lops + Marco de Gemmis)S10: User-centered evaluation, part 2 (Martijn Willemsen + Christine Bauer)S14: Explainability (Leandro Balby Marinho)S18: Closing (Robin Burke)
518:00-21:00Social event: Boat tour & Reffen street foodSocial event: Boulebar


Travel support: Students enrolled at universities in developing and emerging countries are eligible to receive travel support. To apply for funding, send an application to summerschool2023[at] Your application should include a 1-page CV and a letter from your supervisor supporting your participation in the summer school. A maximum of $1500 will be reimbursed.

NB: Travel support will be offered in the form of reimbursement. Should you be granted funding, you will need to register for the school and book/pay for travel and accommodation first and submit receipts afterwards.

Visa invitation letters: Visa invitation letters can be requested when registering. Note that current waiting time for a visa is up to three months.

ECTS credits or certificates of attendance The RecSys Summer School is officially recognized as a Ph.D. course in Denmark. Ph.D. students from Danish universities can claim 1.5 ECTS. For more information refer to the course page.

Ph.D. students from non-Danish universities will get a certificate of attendance issued on request.


Registration is closed. The summer school is sold out.

Registration includes a five day program with courses on recommender systems, coffee breaks and lunches during all five days, and a social event/dinner on one of the evenings.

Registration prices:

TypeEarly (on/before April 30, 2023)Standard (on/before May 31, 2023)Late (from June 1)


The summer school will be held at Copenhagen University, Geografisk Institut, located on Øster Voldgade 10, 1350 København, Denmark


Reaching the venue

  • Walking: 12 minutes walk from Nørreport.
  • By train: Several regional trains stop at Nørreport, one of the main stations in Copenhagen.
  • By bus: Several bus lines stop at Nørreport station.
  • By air: From CPH airport to Nørreport with metro line M2.


Copenhagen is an attractive tourist destination with plenty of hotels, hostels, B&Bs, etc.

The following hotels are recommended:

  • Scandic Nørreport (35 queen-size rooms)
    Availability: 10/06/2023 or 12/06/2023 to 16/06/2023
    School discount: 15% discount using the booking code BOOK110623

  • Cabinn Copenhagen (40 standard rooms)
    Availability: 10/06/2023 to 16/06/2023
    School discount: 15% discount using the booking code BLKKØBENH_006

  • Zleep Hotel Copenhagen Arena (40 flex rooms)
    Availability: 12/06/2023 to 16/06/2023
    School discount: 15% discount using the booking code PROKU120623

N.B.: Please note that all pre-reserved rooms above will be released again 30 days prior to the booking period, and therefore, we cannot guarantee availability after this time. You will, however, be able to use the codes and booking systems until the reservation period begins, should there still be rooms available.

Try to book your room as soon as possible, June is the peak season for tourists in Copenhagen, and rooms will quickly run out.


Morten ArngrenWunderman Nordic, DKWebS1
Leandro Balby MarinhoFederal University of Campina Grande, BRWebS14
Christine BauerUtrecht University, NLWebS5, S10, & S13
Ludovico BorattoUniversity of Cagliari, ITWebS3 & S4
Robin BurkeUC Boulder, USAWebS17 & S18
Humberto CoronaSpotify, NLWebS16
Kim FalkShopify, DKWebS2
Marco de GemmisUniversity of Bari, ITWebS6-S9
David GrausRandstad, NLWebS15
Dietmar JannachUniversity of Klagenfurt, ATWebS1
Mesut KayaAalborg University Copenhagen, DKWebS15
Pasquale LopsUniversity of Bari, ITWebS6-S9
Lien MichielsUniversity of Antwerp, BEWebS12
Cataldo MustoUniversity of Bari, ITWebS6-S9
Daan OdijkRTL, NLWebS11
Marco PolignanoUniversity of Bari, ITWebS6-S9
Giovanni SemeraroUniversity of Bari, ITWebS6-S9
Martijn WillemsenJADS & TUE, NLWebS5, S10
Özlem ÖzgöbekNTNU, NOWebS11