| Under the background of interaction of economic globalization and regionalization, the city regions widely emerge in China and all over the world. It becomes the key spatial unit in global economic space, and nowadays also one of the most important economic geographical phenomenons. This dissertation uses the ideological method of logical positivism to make a comprehensive and deep analysis on the problem of spatial organization of city regions based on the perspective of spatial division of labor, and takes the city region in Yangtze Delta as an example to carry on a empirical analysis. The author tries hard to discover the basic rules of urban regional spatial organization, and gets policy suggestion for advancing the development of city regions'integration. This challenging work can not only deepen the systematic theory cognition of the formation and development of city regions, enrich and consummate the basic theoretical system of regional economics and urban economics, but also offer some references for promoting the coordinated development of China urban region and achieving continued economic growth, as well as the fast development of urbanization and the promotion of global economic status and so on. So, it has the very important theoretical and practical significance.The structure arrangement of this paper will launch the order from fundamental research to empirical analysis. Specifically speaking, there are eight chapters altogether. The 1st chapter is an introduction. The 2nd chapter is the framework of theoretical analysis on spatial division of labor. The 3rd chapter is about spatial division of labor and internal spatial organizations of city regions. The 4th chapter reveals the relationship of spatial division of labor and the exterior spactial relation of city regions. The 5th chapter studies the overall characteristic, the dynamic mechanism and the economic effect of spatial organizations of the city region in Yangtze Delta. The 6th chapter studies the evolutionary process and the present characteristics of internal spatial organizations of the city region in Yangtze Delta. The 7th chapter discusses the evolutionary process and present characteristics of external spatial organizations of the city region in Yangtze Delta. The 8th chapter gives out the main conclusion, the policy suggestion and the research prospect. Among them, the 2nd, the 3rd and the 4th chapter composed the parts of theoretical research, and the 5th chapter, the 6th chapter and the 7th chapter composed the parts of empirical analysis.Main conclusion of this paper's theoretical research part include: (1) City regions is refer to the neighboring cities have closer social economic links than the regional exterior cities under the background of the globalization's fast development, cities concentrated areas have the development trend of obvious integration within the regional area, and it is an important conception that has the suitable theoretical connotation and practice value. (2) The connotation of spatial division of labor is not the reflection of labor division in the geographical space understood based on the literal meaning, but it should be the division of labor took the space as production variable in the process of evolution, so it presents one kind of ubiquitous economic geographical phenomenon, therefore it can be a reasonable and feasible theoretical perspective of analysis on space organizations. (3) Under the hard constraints of natural matrix, based on the evolution of enterprises'spatial division of labor, in the interweaving function of many different scale spaces, under the planning control and policy guidance of government, the spatial organization of city regions is the urban regions'economic space formed ordering structure and ordering process through the change of economic resources and the active space and time, its research compendium should include the connotation , the essential factors, the mechanisms, the paths and so on. (4) City regions is the result of multi-criterion spatial division of labor evolves and stacks continuously, the essential meaning of dynamic evolution of internal spatial organizations of city regions is the spatial interaction, shown as the process in which city centralization and city radiation contact and restrict mutually, the static characteristic of internal spatial organizations of city regions can be generalized as network characteristic. (5)In the evolutionary process of spatial division of labor, multinational corporations globally carried on the spatial management and utilization through the internal relation network and the external relation network, thus the global economic relation of city regions was"constructed".Main conclusion of this paper's empirical research part include: (1) Based on the evolution of spatial division of labor , spatial organization of the city region in Yangtze Delta are evolving unceasingly, the networked degree of internal space organizations is improving continually, the exterior space relation shows a tendency to go closer day by day. As a whole, it has already presented the obvious characteristic of integrated development of the overall regional economic integration, and it has already became one of the most mature city region in development in our country, and gradually becoming one of the six big city regions of the world. (2) The spatial organizations of city region in Yangtze Delta are evolving unceasingly and presenting the increasingly obvious integrated characteristic, the basic reasons lie in the constant perfection of market coordinated mechanism, the strengthening of organization coordinated mechanism and the continuous improvement of government coordinated mechanism. (3)Since the reform and opening policy , in Yangtze Delta, every city's transportation scale has a rapid growth, the spatial transport linkage has been strengthened increasingly, the intensity of economical relation has been enhanced continually, the similar degree of industrial structure have been reduced unceasingly, the industry cluster degree has been enhanced continually, the regional specialization degree has been strengthened continuously. It has obviously indicated that the network level of internal spatial organizations of the city region are enhancing increasingly in Yangtze Delta. (4) The city region in Yangtze Delta through introducing the foreign direct investment (FDI) vigorously and developing the international trade positively, the exterior space relation has been went closer and closer, and it also has occupied a certain status in the global economic space. However, it also has the possibility to develop into the"dependent economy"under this new situation. (5) The competitive edge of industrial manufacturing industry in Yangtze Delta has been mainly established on the basis of the primary production factors for a long time, it was locked basically in the"low-road"in the global value chain (GVC), and therefore the urban region in Yangtze Delta must carry on the strategic adjustment from the"low-road"changes to the"high-road". The key point is the fast development of producer services in the path transforms.Generally speaking, this paper analyzes the spatial organization of city regions based on view of spatial division of labor, formes a series of theoretical cognition of basic rules about spatial organizations of city regions, provides comprehensive summary and reasonable explanation to the practice condition of spatial organizations of the city region in Yangtze Delta, and makes a certain extension and propulsion in the two aspects of theoretical research and empirical analysis. This paper is not only different from the structure description and the regularity summarization to the spatial organization in traditional economic geography summarizes, but also different from the research of spatial organization based on the location selection of enterprises in traditional regional economics and urban economics, simultaneously it also has the obvious difference to the spatial organization analysis which take the economical activity spatial of new economic geography as the core, so it has brighter research characteristic. At the same time, it puts forward a series of policy suggestion such as promoting the reform of market economy, establishing the microscopic foundation, implementing the development and opening, establishing the governance institutions, impelling the political system and social binding and so on .These suggestion can provide policy-making reference to all levels of the governments and the related organizations in Yangtze Delta, as well as provide the corresponding ponder to all levels of the governments and the related organizations of other urban regions.
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