Abstract: To promote the development of the New Economic Geography (NEG) theory,we should not only modify the assumptions according to the logical perfection of the theoretical requirements,but also,more importantly,modify the assumptions according to what occurs in the real spatial economic world.Therefore,this paper breaks through the limitation of one factor mobility hypothesis in the NEG literature and it holds that entrepreneurs and workers can migrate between regions,and workers can also flow freely between industries.Thus,compared with the classically analytically solvable model -the Footloose-Entrepreneur model,we develop a new analytically solvable core-periphery model,which enriches the research conclusions.The innovative viewpoints are summarized as follows:There are three kinds of relationships for the level comparison of break point and sustain point.With the change of freeness of trade,the stable equilibrium of industrial spatial patterns are not always to be the bang-bang equilibrium,and the stable interior asymmetric outcomes also exist,even more,the coexistence of stable interior asymmetric and core-periphery outcomes is possible too,not just only the overlap of stable symmetric outcome and core-periphery outcomes.With the increase of trade freedom and the expenditure share on industrial goods,and the decrease of substitution elasticity between industrial goods,the stable equilibrium will be transformed from symmetric spreading to asymmetric spreading across the two regions.Once the "black hole condition" is satisfied,the local stability would be the interior asymmetric or the core-periphery outcomes,and not just only the core-periphery outcomes.

Key words: multi-factors mobility, endogenous spatial fluctuations, new equilibrium of economic geography