Research On The Innovation Network Structure Of Urban Agglomeration Under Multi-dimensional Proximity

The healthy development and evolution of cities’ Innovation Network is the important foundation of analysis innovation ability in urban.Research of dynamic evolving rules in the innovation network structure and cooperation behavior of nodes、models of spatial differentiation and influencing factors have key meanings to build the innovation-oriented country.This paper build the innovation network,at first,to analysis the dynamic evolving rules and evolving direction in the YangTze River Delta based on the characteristic of spatial distribution、topology structure and complexity of whole network and ego networks.Second,Analysis the key factors influencing the innovation network from the point of view of multi-dimensional proximity.At last,using the negative binomial model estimates the spatial dynamic interaction model based on the multi-dimensional proximity、network effect、urban economic、investment scale etc.The major conclusions are following:(1)The whole network of the YangTze River Delta has the trend of developing to “small-world”.The ego network is evolving from the wide cooperation network to deep exploration,and the process of evolution is an accelerated process.The exploration network is the major power of development and evolution of promoting innovation network later.(2)In the process of innovation network development,geography distance、cognitive distance、economic distance have played the role of promoting,Institution distance blocked it.Cognitive distance is warming,The effect of institution distance is becoming weaker.Trend of economic distance working is stable and more obvious than cognitive proximity work.(3)In the process of development of innovated cooperation,the boundary effect is significant when the spatial distance is blocking and working weakly if far away.City administration level is benefit and the interaction effect with geography proximity is more significant.The network characteristic and structure property have positive working to cooperation between cities.The interaction terms of structure property and multi-dimensional proximity isn’t significant,but character property have additive effects with proximity.Institution proximity decrease the promote work of network character property and the cognitive proximity can make the network character property embed into the mechanism of the innovation cooperation in urban.According to the conclusions,giving the policy recommendations are as follows:Optimize the urban innovation system and the network structure,make full use of the network characteristics promote the innovation cooperation and the building of innovative city.Based on the multi-dimensional proximity,drive the cooperation across the cities keep going.Promote the development of regional integration to make big cities followed with small cities、high innovative cities followed with low innovaticve cities,and make up the gap of the level of innovation between cities,innovation outcome can be shared fairly.Make full use of the economic and population bonus,develop traditional and high tech enterprise qualified with strengths,to promote the building of urban innovation levels and sustainable development of economic.