1. A method performed by a specifically programmed computer system for tracking statistical sentiment associated with an entity over time, the method comprising: (a) inputting a first plurality of texts associated with the entity from a first time period; (b) determining, using the specifically programmed computer system, a first entity statistical sentiment for the first plurality of texts based on terms in the sentiment lexicon which are associated with text corresponding to the entity in the first plurality of texts; (c) ranking the entity in comparison to other entities based on the first entity statistical sentiment and statistical sentiment of the other entities for the first time period to obtain an first entity score for the first time period; (d) repeating steps (a) through (c) for at least a second time period different from the first time period to obtain a second entity score for the second time period; and (e) smoothing the second entity score based on the first entity score.