Recommender systems are being used by an ever-increasing number of E-commerce sites to
help consumers find products to purchase. What started as a novelty has turned into a serious
business tool. Recommender systems use product knowledge – either hand-coded knowledge
provided by experts or “mined” knowledge learned from the behavior of consumers – to guide
consumers through the often-overwhelming task of locating products they will like. In this
article we present an explanation of how recommender systems are related to some traditional
database analysis techniques. We examine how recommender systems help E-commerce sites
increase sales and analyze the recommender systems at six market-leading sites. Based on
these examples, we create a taxonomy of recommender systems, including the inputs required
from the consumers, the additional knowledge required from the database, the ways the
recommendations are presented to consumers, the technologies used to create the
recommendations, and the level of personalization of the recommendations. We identify five
commonly used E-commerce recommender application models, describe several open research
problems in the field of recommender systems, and examine privacy implications of
recommender systems technology.
Recommender systems are being used by an ever-increasing number of E-commerce sites to
help consumers find products to purchase. What started as a novelty has turned into a serious
business tool. Recommender systems use product knowledge – either hand-coded knowledge
provided by experts or “mined” knowledge learned from the behavior of consumers – to guide
consumers through the often-overwhelming task of locating products they will like. In this
article we present an explanation of how recommender systems are related to some traditional
database analysis techniques. We examine how recommender systems help E-commerce sites
increase sales and analyze the recommender systems at six market-leading sites. Based on
these examples, we create a taxonomy of recommender systems, including the inputs required
from the consumers, the additional knowledge required from the database, the ways the
recommendations are presented to consumers, the technologies used to create the
recommendations, and the level of personalization of the recommendations. We identify five
commonly used E-commerce recommender application models, describe several open research
problems in the field of recommender systems, and examine privacy implications of
recommender systems technology.
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