Study Choosing Data of Two-Level Algorithm of GMDH and Applications

The price idex is very inportant in the economic system,and it is difficult to predict accurately it is difficult to predict accurately because of the reason and the long intervals. We solve this problems with harmonic algorithm and two-leve algorithm of GMDH.The result that we researched the problems of prediction with the theory and methods in example show thatthis method is very efficient in example.