Complementary Recommendation in E-commerce: Definition, Approaches, and Future Directions

TL;DR

This paper provides a comprehensive review of 34 studies on complementary product recommendation in e-commerce, comparing methods, data, and results, and discusses future research directions.

Contribution

It offers an updated, detailed survey of modeling approaches, research problems, and experimental findings in complementary recommendation, highlighting future directions.

Findings

Comparison of modeling methods and data used in studies

Analysis of experimental results across datasets

Identification of strengths and weaknesses in current research

Abstract

In recent years, complementary recommendation has received extensive attention in the e-commerce domain. In this paper, we comprehensively summarize and compare 34 representative studies conducted between 2009 and 2024. Firstly, we compare the data and methods used for modeling complementary relationships between products, including simple complementarity and more complex scenarios such as asymmetric complementarity, the coexistence of substitution and complementarity relationships between products, and varying degrees of complementarity between different pairs of products. Next, we classify and compare the models based on the research problems of complementary recommendation, such as diversity, personalization, and cold-start. Furthermore, we provide a comparative analysis of experimental results from different studies conducted on the same dataset, which helps identify the strengths and weaknesses of the research. Compared to previous surveys, this paper provides a more updated and comprehensive summary of the research, discusses future research directions, and contributes to the advancement of this field.