Best Approximate Aggregation of Input—Output Systems
投入产出系统的最优近似聚合
A method of constructing aggregate input—output systems is proposed. The procedure minimizes the mean squared error of aggregate predictions. The range of data on which the aggregate model is to be applied influences the best approximate aggregate. Best approximate aggregate models maximize Ijiri's coefficient of aggregation. In a special case, Fisher's aggregated model emerges: if consistent aggregation is possible it gives the best approximate aggregate. Computations…