Research On The Social Welfare Effect Of Shared Economy From The Perspective Of Market Structure Evolution

In recent years,China's shared economy has maintained a rapid development trend.New formats and new models have continued to emerge.They have played an important role in cultivating new kinetic energy development and promoting employment.They are a prominent highlight of economic transformation and development in the new era.The sharing economy model can not only help the supply side reform,but also promote the national economic development,and can optimize the allocation of stock resources,expand the high-quality incremental supply,and achieve a dynamic balance between supply and demand.As a typical model of the Internet economy,the shared economic format has the dual characteristics of "network economy" and "platform economy".Further,due to its starting point and foothold of "creating social value with idle resources",the sharing economy has the attribute of "inclusive economy".When "resources are idle" has become the new normal of today's society,every transaction in the "unused or wasted" shared economy market is a Pareto improvement,which enhances social welfare on the basis of a win-win situation between the supply and demand sides.Based on the three typical stages of the evolution of sharing economy market structure,this paper builds up a theoretical model to characterize the intrinsic relationship among technology empowerment,user scale and social welfare.The result shows that:at the initial stage,the market is in a state of local monopoly,at this time the loss of economic and social welfare is manifest,and the level of welfare depends mainly on the technical empowerment;at the developmental stage,with the market areas of the sharing economy platforms overlapping,user-scale expansion competition will enhance social welfare;at the mature stage,featuring the merger and acquisition among platforms and the formation of"competitive monopoly" market structure,the social welfare may be boosted again.Further model analysis reveals its internal mechanism:technology has the dual effect of "substitution"and "excavation" on social welfare,while user scale exerts positive and negative external effects on social welfare.On this basis,this paper takes the dynamic development process between "Didi Chuxing","Speedy Taxi-taking" and "Uber-China" as an example to verify the theoretical propositions proposed in this study from the practice level.First,follow the three-stage market structure paradigm,analyze the co-opetition process between Didi Chuxing and Speedy Taxi-taking,and explore the relationship between technical empowerment,user scale and shared economic market social welfare under different market structures from a practical perspective.Relationships,and give the mechanism of action of the two.Secondly,Uber China's entry is regarded as an exogenous technological shock variable.Through its iterative analysis with the competition and merger between the merged Didi Chuxing trips,the theoretical and actual coincidences are further verified,and the sharing economy is summarized.The periodicity of the stage market structure paradigm.This paper provides useful guidance for the platform strategy and government regulation of the sharing economy.