Following the trend of web 2.0, lots of social networking
websites such as blogs, Twitters, Facebook, and so on have
attracted many internet users to express their personal thoughts
and opinions, and then a huge amount of semantic text data has
been generated [1]. These personal comments might influence
other internet users’ ideas and thinking [27] these websites,
people can exchange products’ information and thus make
purchase decision based on other users’ comments [23, 27].
Recently, many companies attempted to increase their new
products’ visibility through these new internet media, because
these online words of mouth have been considered one of
important factors for changing consumer behaviors [29].
Reputation is a valuable asset for any enterprise; it needs a
long term investment to keep good relationship between
companies and their customers [29]. Therefore, keeping a
positive image is very expensive for enterprise. However, few
negative online words of mouth can bring a fatal damage to
enterprises [33]. Thus, enterprises understand the importance of
online users’ comments and opinions. So, they started to create
some untrue professional comments and customer reviews to
change consumer behaviors. It calls “review manipulation”.