# Book: Probabilistic Approaches to Recommendations

Learn about the challenges of the recommendation problem and common probabilistic solutions to it, then dive into state of the art techniques in Probabilistic Approaches to Recommendation.

By Shane Clyburn, Morgan & Claypool, July 2014.

I am pleased to announce the latest title in Morgan & Claypoolâ€™s series on Data Mining and Knowledge Discovery:

Nicola Barbieri,

Giuseppe Manco,

Ettore Ritacco,

eBook ISBN: 9781627052580

The importance of accurate recommender systems has been widely recognized by academia and industry, and recommendation is rapidly becoming one of the most successful applications of data mining and machine learning. Understanding and predicting the choices and preferences of users is a challenging task: real-world scenarios involve users behaving in complex situations, where prior beliefs, specific tendencies, and reciprocal influences jointly contribute to determining the preferences of users toward huge amounts of information, services, and products. Probabilistic modeling represents a robust formal mathematical framework to model these assumptions and study their effects in the recommendation process.

This book starts with a brief summary of the recommendation problem and its challenges and a review of some widely used techniques. Next, we introduce and discuss probabilistic approaches for modeling preference data. We focus our attention on methods based on latent factors, such as mixture models, probabilistic matrix factorization, and topic models, for explicit and implicit preference data. These methods represent a significant advance in the research and technology of recommendation. The resulting models allow us to identify complex patterns in preference data, which can be exploited to predict future purchases effectively.

The extreme sparsity of preference data poses serious challenges to the modeling of user preferences, especially in the cases where few observations are available. Bayesian inference techniques elegantly address the need for regularization, and their integration with latent factor modeling helps to boost the performances of the basic techniques.

We summarize the strengths and weakness of several approaches by considering two different but related evaluation perspectives, namely, rating prediction and recommendation accuracy. Furthermore, we describe how probabilistic methods based on latent factors enable the exploitation of preference patterns in novel applications beyond rating prediction or recommendation accuracy.

We finally discuss the application of probabilistic techniques in two additional scenarios, characterized by the availability of side information besides preference data. In summary, the book categorizes the myriad probabilistic approaches to recommendations and provides guidelines for their adoption in real-world situations.

Read More

Series: Synthesis on Data Mining and Knowledge Discovery

Series Editors: Jiawei Han, Lise Getoor, Wei Wang, Johannes Gehrke, and Robert Grossman

http://www.morganclaypool.com/toc/dmk/1/1

This book can also be purchased in print from Amazon and other booksellers worldwide.

Amazon URL: http://amzn.to/1jY4CUm

Individual subscriptions to Synthesis are available for just $99.00 per year. This subscription will provide individuals with unrestricted access to all Synthesis titles: http://www.morganclaypool.com/page/subscribe

Available titles and subject areas:

http://www.morganclaypool.com/page/browseLbS.jsp

Information for librarians, including pricing and license:

http://www.morganclaypool.com/page/librarian_info

Please contact info@morganclaypool.com to request your desk copy

I am pleased to announce the latest title in Morgan & Claypoolâ€™s series on Data Mining and Knowledge Discovery:

**Probabilistic Approaches to Recommendations**Nicola Barbieri,

*Yahoo Labs, Barcelona, Spain*Giuseppe Manco,

*ICAR-CNR, Rende, Italy*Ettore Ritacco,

*ICAR-CNR, Rende, Italy*

Paperback ISBN: 9781627052573, $45.00eBook ISBN: 9781627052580

*May 2014, 197 pages*

*http://dx.doi.org/10.2200/S00574ED1V01Y201403DMK009*

**Abstract:**The importance of accurate recommender systems has been widely recognized by academia and industry, and recommendation is rapidly becoming one of the most successful applications of data mining and machine learning. Understanding and predicting the choices and preferences of users is a challenging task: real-world scenarios involve users behaving in complex situations, where prior beliefs, specific tendencies, and reciprocal influences jointly contribute to determining the preferences of users toward huge amounts of information, services, and products. Probabilistic modeling represents a robust formal mathematical framework to model these assumptions and study their effects in the recommendation process.

This book starts with a brief summary of the recommendation problem and its challenges and a review of some widely used techniques. Next, we introduce and discuss probabilistic approaches for modeling preference data. We focus our attention on methods based on latent factors, such as mixture models, probabilistic matrix factorization, and topic models, for explicit and implicit preference data. These methods represent a significant advance in the research and technology of recommendation. The resulting models allow us to identify complex patterns in preference data, which can be exploited to predict future purchases effectively.

The extreme sparsity of preference data poses serious challenges to the modeling of user preferences, especially in the cases where few observations are available. Bayesian inference techniques elegantly address the need for regularization, and their integration with latent factor modeling helps to boost the performances of the basic techniques.

We summarize the strengths and weakness of several approaches by considering two different but related evaluation perspectives, namely, rating prediction and recommendation accuracy. Furthermore, we describe how probabilistic methods based on latent factors enable the exploitation of preference patterns in novel applications beyond rating prediction or recommendation accuracy.

We finally discuss the application of probabilistic techniques in two additional scenarios, characterized by the availability of side information besides preference data. In summary, the book categorizes the myriad probabilistic approaches to recommendations and provides guidelines for their adoption in real-world situations.

Read More

Series: Synthesis on Data Mining and Knowledge Discovery

Series Editors: Jiawei Han, Lise Getoor, Wei Wang, Johannes Gehrke, and Robert Grossman

http://www.morganclaypool.com/toc/dmk/1/1

This book can also be purchased in print from Amazon and other booksellers worldwide.

Amazon URL: http://amzn.to/1jY4CUm

Individual subscriptions to Synthesis are available for just $99.00 per year. This subscription will provide individuals with unrestricted access to all Synthesis titles: http://www.morganclaypool.com/page/subscribe

Available titles and subject areas:

http://www.morganclaypool.com/page/browseLbS.jsp

Information for librarians, including pricing and license:

http://www.morganclaypool.com/page/librarian_info

Please contact info@morganclaypool.com to request your desk copy