[PROBLEMS] To find a method for estimating overseas patent costs, particularly patent costs in the United States more accurately and efficiently, by comparing various prediction methods including statistical methods, thereby reducing overseas patent costs. A prediction system, apparatus, method, and recording medium are provided. A procedure for predicting the number of occurrences of the next procedure by a plurality of prediction methods based on data relating to overseas patent application procedures, a procedure for calculating a prediction error by each prediction method, and a prediction method for minimizing the prediction error And a procedure for outputting a prediction processing result calculated by the selected prediction method. [Selection] Figure 2
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