Paper Info
Title
Budget-Constrained Item Cold-Start Handling in Collaborative Filtering Recommenders via Optimal Design.
Abstract
It is well known that collaborative filtering (CF) based recommender systems provide better modeling of users and items associated with considerable rating history. The lack of historical ratings results in the user and the item cold-start problems. The latter is the main focus of this work. Most of the current literature addresses this problem by integrating content-based recommendation techniques to model the new item. However, in many cases such content is not available, and the question arises is whether this problem can be mitigated using CF techniques only. We formalize this problem as an optimization problem: given a new item, a pool of available users, and a budget constraint, select which users to assign with the task of rating the new item in order to minimize the prediction error of our model. We show that the objective function is monotone-supermodular, and propose efficient optimal design based algorithms that attain an approximation to its optimum. Our findings are verified by an empirical study using the Netflix dataset, where the proposed algorithms outperform several baselines for the problem at hand.
Year
DOI
Venue
2014
10.1145/2736277.2741109
Proceedings of the 24th International Conference on World Wide Web
Keywords
Field
DocType
collaborative filtering, item cold-start, optimal design
Data mining,Budget constraint,Computer science,Baseline (configuration management),Optimal design,Artificial intelligence,Optimization problem,Empirical research,Recommender system,World Wide Web,Collaborative filtering,Cold start (automotive),Machine learning
Journal
Citations 
PageRank 
References 
13
0.59
21
Authors
7
Name
Order
Citations
PageRank
Oren Anava1704.86
Shahar Golan2575.72
Nadav Golbandi343618.68
Zohar S. Karnin426620.98
Ronny Lempel51273112.55
Oleg Rokhlenko625017.03
Oren Somekh756048.58