Reversibility of the Accessibility Between Demand and Supply - New Adjustment Theory of Market and Policy of Infrastructure Under Technological Development-

现代经济的特点是技术进步、信息化和全球化。基于这些条件，我们的研究目的是重新审视市场形成、扩大和收缩的问题。在供需可及性理论中，对市场信息传递过程的研究是非常重要的。这是为了回答需求和供给群体是如何形成的。在什么条件下两组都可以访问？酒井助理教授研究了供应严重短缺的经济体可以引入市场机制的条件，证明了中央计划经济和控制的合理性。山田清楚地定义了自然资源的存在及其需求能够被市场所证明的条件。Watanabe明确了在可达性调整过程中可以发展哪些类型的内部组织或产业结构。我们的研究重点是需求和供给之间可及性的逆转。反转意味着市场扩张和收缩；随着时间的推移，供求关系的调整方式将会逆转。从供求可及性调节理论中的反转概念出发，发展了社会选择理论。第三，在这些逆转中，最显著的是决策和流动性的转变，即从农业社会向工业社会向知识社会的转变，以及选择工作或居住地点的优先顺序的变化。这些与城市/区域发展密切相关。（请参阅藤井，1986年）。

Modern economies can be characterized by technological advances, informatization and globality. Based on these conditions, the objective of our research is to reexamine the problem of market formation, its enlargement and contraction. As in teh theroy of the accessibility between demand and supply, the research on the process of market information is very important. That is to offer an answer to how the demand and supply groups are formed. Under waht conditions are both groups accessible?Asst. Professor Sakai examined the condition of accessibility in which economies with severe shortage of supply, justifying Central planning economies and control can introduce market mechanism.Prof. Yamada clearly defined the conditions in which the existence of natural resources and its demand can be justified by the market.Prof. Watanabe clarified which types of internal organization or industrial structure can be developed in the process of adjustment of accessibility.Second. our research focuses on the reversal of the accessibility between demand and supply.The reversal means market enlargement and contraction; and the adjustment approach from supply and demand will reverse as time passes. From the reversal concept in teh theory of adjustment of accessibility between demand and supply, Asst. Professor Umeshita developed the theory of social choice.Third, among these reversals, the most remarkable is the turning in decision making and mobility, i.e., the shifting from an agricultural to and industrial society to a knowledge society and the changing in priority of choosing working or residential place. These relate with urban/regional develepment very much. (Please refer to Fujii, 1986).