“…That is why it has been widely studied. Such studies do not necessarily include ratings, for instance sequential patterns (Nakagawa & Mobasher, 2003) or Markov models (Borges & Levene, 2005;Deshpande & Karypis, 2004;Eirinaki & Vazirgiannis, 2007;Pitkow & Pirolli, 1999), although some other do (Trousse, 2000). Web predictive modeling usually attempts to provide a tradeoff between accuracy, space and time complexity, and coverage (Deshpande & Karypis, 2004;Pitkow & Pirolli, 1999).…”