In this study for Aichi Prefecture, the threshold sales, which stand for the minimum sales volumes necessary to support a retail store, are measured. They are determined by least squares averaging technique which computes for each central function the best fitting relationship of the equation S=aF
b (where S is the annual sales volume of centers, F is the number of stores located in the centers, and a and b are parameters to be estimated, see Table I).
Then, the threshold sales are converted to the threshold populations which mean the minimum numbers of consumers necessary to provide a sales volume adequate for the good to be supplied profitably from the store. And 64 business types located in urbanized area are ranked according to the threshold populations and divided into 6 groups suggesting the discontinuity of functional levels.
It may be necessary, in the real world under imperfect competition in the provision of goods, to determine the level of a function not only by the threshold population but also by the population per store which is variable according to the levels of demand in market.
抄録全体を表示