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GSM (Global Services of Mobile Communications) 1800 licenses were granted in the beginning of the 2000's in Turkey. Especially in the installation phase of the wireless telecom services, fraud usage can be an important source of revenue loss. Fraud can be defined as a dishonest or illegal use of services, with the intention to avoid service charges. Fraud(More)
Previous studies on user-product review data have fo-cused on inferring a user's preferences based on their past reviews and reviews for similar iterms by other users. The objective was to reccommend items that a user might like. Very few studies have considered the chronological order of a user's reviews. For this project, we evaluate how a user's choices(More)
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