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Cross-domain recommendation (CDR) methods predominantly leverage overlapping users to transfer knowledge from a source domain to a target domain. However, through empirical studies, we uncover a critical bias inherent in these approaches:…

Information Retrieval · Computer Science 2025-07-24 Weixin Chen , Yuhan Zhao , Li Chen , Weike Pan

The behavior of users in certain services could be a clue that can be used to infer their preferences and may be used to make recommendations for other services they have never used. However, the cross-domain relationships between items and…

Machine Learning · Computer Science 2018-03-09 Heishiro Kanagawa , Hayato Kobayashi , Nobuyuki Shimizu , Yukihiro Tagami , Taiji Suzuki

The conventional single-target Cross-Domain Recommendation (CDR) aims to improve the recommendation performance on a sparser target domain by transferring the knowledge from a source domain that contains relatively richer information. By…

Information Retrieval · Computer Science 2023-07-27 Jiajie Zhu , Yan Wang , Feng Zhu , Zhu Sun

Cross-domain Recommendation (CDR) exploits multi-domain correlations to alleviate data sparsity. As a core task within this field, inter-domain recommendation focuses on predicting preferences for users who interact in a source domain but…

Information Retrieval · Computer Science 2026-04-08 Ziang Lu , Lei Sang , Lin Mu , Yiwen Zhang

Cross-domain recommendation (CDR) is an important method to improve recommender system performance, especially when observations in target domains are sparse. However, most existing cross-domain recommendations fail to fully utilize the…

Information Retrieval · Computer Science 2024-01-23 Yuhao Luo , Shiwei Ma , Mingjun Nie , Changping Peng , Zhangang Lin , Jingping Shao , Qianfang Xu

Data sparsity and cold-start problems are persistent challenges in recommendation systems. Cross-domain recommendation (CDR) is a promising solution that utilizes knowledge from the source domain to improve the recommendation performance in…

Information Retrieval · Computer Science 2023-11-07 Yanyu Chen , Yao Yao , Wai Kin Victor Chan , Li Xiao , Kai Zhang , Liang Zhang , Yun Ye

Cross-domain recommendation (CDR) aims to improve recommendation accuracy in sparse domains by transferring knowledge from data-rich domains. However, existing CDR approaches often assume that user-item interaction data across domains is…

Information Retrieval · Computer Science 2025-05-16 Li Wang , Qiang Wu , Min Xu

Cross-Domain Recommendation (CDR) is a promising paradigm inspired by transfer learning to solve the cold-start problem in recommender systems. Existing state-of-the-art CDR methods train an explicit mapping function to transfer the…

Information Retrieval · Computer Science 2024-08-07 Guohang Zeng , Qian Zhang , Guangquan Zhang , Jie Lu

Cross-domain recommendation (CDR) aims to alleviate the data sparsity by transferring knowledge across domains. Disentangled representation learning provides an effective solution to model complex user preferences by separating intra-domain…

Information Retrieval · Computer Science 2025-07-24 Yuhan Wang , Qing Xie , Zhifeng Bao , Mengzi Tang , Lin Li , Yongjian Liu

Cross-domain recommendation (CDR) has emerged as a promising solution to the cold-start problem, faced by single-domain recommender systems. However, existing CDR models rely on complex neural architectures, large datasets, and significant…

Information Retrieval · Computer Science 2024-12-02 Ajay Krishna Vajjala , Dipak Meher , Ziwei Zhu , David S. Rosenblum

Cross-domain recommender (CDR) systems aim to enhance the performance of the target domain by utilizing data from other related domains. However, irrelevant information from the source domain may instead degrade target domain performance,…

Information Retrieval · Computer Science 2024-04-01 Hanyu Li , Weizhi Ma , Peijie Sun , Jiayu Li , Cunxiang Yin , Yancheng He , Guoqiang Xu , Min Zhang , Shaoping Ma

Collaborative filtering (CF) aims to predict users' ratings on items according to historical user-item preference data. In many real-world applications, preference data are usually sparse, which would make models overfit and fail to give…

Machine Learning · Computer Science 2012-10-29 Zhongqi Lu , Erheng Zhong , Lili Zhao , Wei Xiang , Weike Pan , Qiang Yang

Cross-Domain Collaborative Filtering (CDCF) provides a way to alleviate data sparsity and cold-start problems present in recommendation systems by exploiting the knowledge from related domains. Existing CDCF models are either based on…

Information Retrieval · Computer Science 2019-07-22 Vijaikumar M , Shirish Shevade , M N Murty

As user behavior data becomes increasingly scattered across different platforms, achieving cross-domain knowledge fusion while preserving privacy has become a critical issue in recommender systems. Existing PPCDR methods usually rely on…

Information Retrieval · Computer Science 2026-05-07 Lei Guo , Ting Yang , Xu Yu , Xiaohui Han , Guiyuan Jiang , Hui Liu

Recommender systems have been widely deployed in many real-world applications, but usually suffer from the long-standing user cold-start problem. As a promising way, Cross-Domain Recommendation (CDR) has attracted a surge of interest, which…

Information Retrieval · Computer Science 2022-04-01 Jiangxia Cao , Jiawei Sheng , Xin Cong , Tingwen Liu , Bin Wang

Making accurate recommendations for cold-start users has been a longstanding and critical challenge for recommender systems (RS). Cross-domain recommendations (CDR) offer a solution to tackle such a cold-start problem when there is no…

Information Retrieval · Computer Science 2021-06-21 Lei Chen , Fajie Yuan , Jiaxi Yang , Xiangnan He , Chengming Li , Min Yang

Cross-domain recommendation (CDR) has been increasingly explored to address data sparsity and cold-start issues. However, recent approaches typically disentangle domain-invariant features shared between source and target domains, as well as…

Information Retrieval · Computer Science 2026-01-27 Junyou He , Lixi Deng , Huichao Guo , Ye Tang , Yong Li , Sulong Xu

Cross-Domain Recommendation (CDR) and Cross-System Recommendation (CSR) have been proposed to improve the recommendation accuracy in a target dataset (domain/system) with the help of a source one with relatively richer information. However,…

Information Retrieval · Computer Science 2021-08-19 Feng Zhu , Yan Wang , Jun Zhou , Chaochao Chen , Longfei Li , Guanfeng Liu

Cross-domain recommendation (CDR) has been proven as a promising way to alleviate the cold-start issue, in which the most critical problem is how to draw an informative user representation in the target domain via the transfer of user…

Information Retrieval · Computer Science 2025-01-22 Xiaodong Li , Hengzhu Tang , Jiawei Sheng , Xinghua Zhang , Li Gao , Suqi Cheng , Dawei Yin , Tingwen Liu

Cross-domain sequential recommendation (CDSR) aims to uncover and transfer users' sequential preferences across multiple recommendation domains. While significant endeavors have been made, they primarily concentrated on developing advanced…

Information Retrieval · Computer Science 2024-08-22 Mingjia Yin , Hao Wang , Wei Guo , Yong Liu , Zhi Li , Sirui Zhao , Zhen Wang , Defu Lian , Enhong Chen