The Research On The Match Of Urban And Population In China

There is a big difference in the conclusion of the agglomeration in which cities are completely specialized or completely diverse.This paper attempts to use coagglomeration as the starting point of urban economy,And the ideas of match and methods of market design in experimental economics is also applied with Chinese cities' data at the first time.The three aspects of problems on match between city and population are discussed.Firstly,the paper demonstrates that equilibrium cities will be inefficient in scale and may be inefficient in composition by the free migration of population on the premise of coagglomeration.Second,we explore the relationship about urban productivity,agglomeration economy and selection effect.Third,the development trend of urbanization is discussed.In this paper,the basic ideas of the above problems depend on the "one state and two effects",First,"one state" refers to the industry in cities is assumed neutral state between diversification and specialization,The hypothesis on the coagglomeration is not only more realistic but also avoid opposing conclusions.Secondly,one of the "two effect" is the own-industry effects,it seems consistent with the evidence to suppose that the own-industry effects are stronger than the cross-industry effects.This leads to a kind of“plurality chasing," where workers seek cities in which their own type dominates.Finally,in the case of coagglomeration,the other effect is selection effects,where the difference of urban labor productivity is influenced by the selection.The first step,exante chioce:highly skilled labor force to choose larger scale or resource-intensive cities;Second,expost chioce:only more productivity enterprises/labor force can to survive in larger cities,so average productivity is higher.In this paper,the conclusion of the research on the match of cities and population in China is summarized as follows:?In view of coagglomeration,the Pareto efficient cities will not be consistent with Nash equilibrium by the free migration of the population,namely "two yuan paradox" exists.because we are assuming that own-industry effects are large relative to effects associated with any particular other industry.? There is a strong correlation between urban scale,industrial cluster and selection effects.The phenomenon of "two yuan paradox"become increasingly prominent if the implementation of the policy of industrial cluster in industrial park or new zone.It is necessary to implement the policy of population mobility.Owing to adding another one type worker has a larger impact on productivity in its own industry than another industry.So There is a kind of "plurality chasing" where workers seek cities in which their own type dominates,It leads to equilibrium cities that are too large.?large gaps of productivity in cities come from agglomeration economies or the selection effects.excellent talents move into the developed cities,the low skill labor population come back to the backward areas,which raised many questions that economic convergence will be not particularly evident,even the regional income gap will widen.After the selection effects and agglomeration economies are mutually reinforcing,the average productivity of big cities are higher,and backward areas of urbanization rate increased due to expansion of the employment in non-tradables service sector.However,The productivity of non-tradables sectors will not increase as much as other sectors,Increasement in productivity of non-tradables sectors directly turn into the prices fell,so this kind of pattern of urbanization immediately obviously influences on economic convergence.The final trend of urbanization is that the complementary of high or low skill extreme labor force in big cities is gradually increasing.Big cities have the characteristics of "productive cities",while the backward small and medium-sized cities are on the way to "consuming cities".The main innovations of this paper are as follows:firstly,this paper discusses the problems of urban development and the urbanization in China based on the theory of co agglomeration;Second,The relationship between cities and the populations will be considered as unique two-side matching markets in China,a large number of match theory and experimental economics is used to simulate labors migration so as to explain the results that empirical data can not be predicted.Third,One new economic model which includes four sectors(agriculture,tradables,non-tradables,resources-labor)is constructed to discuss the development trend of urbanization in backward areas at the first time.