Abstract: A worker compensation data mining computer system includes a data collection computer interface receiving worker's compensation data, optionally stored by a third party data provider or a state database, and a data mining computer processing unit analyzing the worker's compensation data to determine trends in the worker's compensation data. The data mining computer processing unit generates one or more of the following: a fraud communication, a model, a predictive variable, a marketing communication, a sales communication, a pricing communication, a prospecting communication, a ratings communication, a sales communication, and an underwriting communication. The system also optionally includes a modeling computer processing unit, that analyzes one or more of the worker's compensation data, underwriting models, sales models, pricing models, ratings models, marketing models, fraud models, and prospecting models, to determine whether to modify the at least one of the models.