DEVICE AND METHOD FOR MONTHLY GPD CALCULATION, RECORDING MEDIUM WHERE PROCESS FOR SAME IS RECORDED, DEVICE AND METHOD FOR ECONOMICAL DIFFUSION INDEX CALCULATION, AND RECORDING MEDIUM WHERE PROCESS FOR SAME IS RECORDED

摘要

PROBLEM TO BE SOLVED: To calculate a monthly GDP and a economical diffusion index which can be announced early by providing a bifacial equivalent calculating means which inputs a monthly GDP of demand and a monthly GDP of supply from a monthly GDP storage means and calculates a bifacial equivalent monthly GDP. SOLUTION: A monthly GDP database of a monthly GDP calculation system 10 is constructed on a hard disk to constitute a 'monthly GDP storage means'. This monthly GDP database 14 is stored with various data needed by a monthly GDP calculation computer to calculate a monthly GDP of demand and a monthly GDP of supply. Then the computer 12 inputs a monthly GDP of demand and a monthly GDP of supply from the monthly GDP database 14 and calculates a bifacial equivalent monthly GDP from the monthly GDP of demand and the monthly GDP of supply. Consequently, the bifacial equivalent monthly GDP which is a monthly GDP and a economical diffusion index can be calculated.