Typical statistical models includes Hierarchical Dirichlet process (HDP) model (Goldwater et al., 2009), Nested Pitman-Yor process (NPY) model (Mochihashi et al., 2009) etc, which are actually nonparametric language models and therefor can be categorized as word-based model.
table 2 summarizes the F-Scores obtained by different models on PKU and MSRA corpus, as well as several state-of-the-art systems.