Because perishables decay easily and can not be stocked on long-term basis, they are classified as convenience goods. Therefore, perishable distribution tends toward frequent and small lot transaction patterns. Moreover, because detailed information about the quality change of perishables in circulation and the weather situation of a producing area is in high demand, the trader must build an information transfer system which is more advanced than that for other goods. In this research, the paradigm conversion mechanism into specific long-range dealings from the unspecified multitude dealings is examined from the viewpoint of microeconomics and analyzed as an advancement of domestic and foreign data network systems. The findings include the following. When implementing a data network system, especially in the early stages, formation of a level closed distribution channel is unavoidable. Following this, mutually complementing relations emerge vertically as corporations specialize in their core business. However, if the scale of the lot which corresponds to the system management cost isn't reached, the implementation effect doesn't emerge sufficiently. If the actual transaction does not involve perishables, an asymmetrical information condition emerges, therefore, the paper suggests that efforts to organize something to complement an information system, for example "a sales organization for human communication" or "branding to rationalize information exchange," are important.
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