This article examines the effect of recommender systems on the diversity of sales.
Two views exist about such effects. Some believe recommenders help consumers discover new products and thus increase sales diversity.
Others believe recommenders only reinforce the popularity of already popular products.his can create" rich-get-richer effects" for popular products and vice-versa for unpopular ones, which results in less diversity.
The authors do not disagree that recommenders beat old-school bestseller lists. But they argue that recommenders lead to less diversity in a world where consumers can also use tools like search engines.
Read the entire article at : http://knowledge.wharton.upenn.edu/articlepdf/1818.pdf?CFID=52235728&CFTOKEN=47328682&jsessionid=a830a8fe82ce46682727
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