1. A computer implemented method comprising by computer, over a period of time engaging in an ongoing succession of related operations each of which comprises receiving an item of input data representing a case or generating an output premise, at least some of the output premises being generated between the receiving of successive items of input data, the items of input data received in the succession of related operations representing information about unpredictable human economic behavior, the output premises generated in the succession of related operations representing advice concerning the unpredictable human economic behavior, the generating of one or more of the output premises comprising: by computer running (a) a first interim premise generator to apply a first computational process to one of the received items of input data to generate first interim data, and (b) a second interim premise generator to apply a second computational process to the first interim data to generate second interim data, and by computer managing the running of the first interim premise generator and the second interim premise generator so that (a) the first computational process comprises an analytical computational process and the second computational process comprises a statistical computational process, or (b) the first computational process comprises a statistical computational process and the second computational process comprises an analytical computational process, the output premise being based on at least the second interim data generated by the second interim premise generator, the statistical computational process being based on statistical features of a body of statistical data about human economic behavior and adapts to changes in the body of statistical data.