The 2nd Workshop on the Impact of Recommender Systems with ACM RecSys 2020

The 2nd Workshop on the Impact of Recommender Systems with ACM RecSys 2020

Co-located with the 14th ACM Conference on Recommender Systems, 25th September 2020, Rio de Janeiro, Brazil.

Important Note

ACM RecSys '20 will be held fully online due to the current circumstances. The workshop will be held online as well. We will update you with additional information about the workshop organization once it is available. Deadlines have been postponed as shown below.


31-March-2020: Prof. Barry Smyth confirmed as keynote speaker for the workshop.

Image Barry Smyth    


The workshop consists of an opening keynote, oral presentations of research papers, the presentation of position papers as posters during the coffee break, and a concluding open discussion.

The proceedings of the workshop will be published at


Research in the area of recommender systems is largely focused on helping individual users finding items they are interested in. This is usually done by learning to rank the recommendable items based on their assumed relevance for each user. The implicit underlying goal of a such system is to affect users in different positive ways, e.g., by making their search and decision processes easier or by helping them discover new things.

Recommender systems can, however, also have other more directly-measurable impacts, e.g., such that go beyond the individual user or the short term influence. A recommender system on a news platform, for example, can lead to a shift in the reading patterns of the entire user base. Similarly, on e-commerce platforms, it has been shown that a recommender can induce significant changes in the purchase behavior of consumers, leading, for example, to generally higher sales diversity across the site. On the other hand, recommender systems usually serve certain business goals and can have an impact not only on the customers, e.g., by stimulating higher engagement on a media streaming platform or a social network, but also direct and indirect affect sales, revenue or conversion and churn rates.

The workshop is a successor of the First Workshop on the Impact of Recommender Systems (ImpactRS 2019), which was held at ACM RecSys 2019 in Copenhagen.

Goals of the Workshop

The research literature that considers such more direct measurements of impact of recommender systems on the various stakeholders is comparably scarce and scattered. With the proposed workshop, we pursue different goals.


The topics of interest include, e.g.,

Submission and Publication

Submission types are long research papers reporting on complete research (14 pages plus references), short papers reporting on work in progress (7 pages plus references), and position papers (up to four pages including references). Submissions must be formatted according to the conference guidelines (ACM SIG Proceedings Template - single column) and submitted via EasyChair.

The review process is single-blind, i.e., please include author names in the papers. All papers will be peer reviewed by the workshop's program committee.

Accepted papers will be published within formal proceedings at

Important dates


Workshop Co-Organizers

Program Committee


If you have questions regarding the workshop, do not hesitate to contact the workshop chairs: