关键词:

市场准入, 
	                                                                        											                                       供应链配置, 
	                                                                        											                                       市场竞争, 
	                                                                        											                                       资源配置, 
	                                                                        											                                       供应链韧性

Abstract:

The world today is undergoing unprecedented changes in a century，with intensifying competition among major powers，a significant rise unilateralism and protectionism，and the continuous spread of antiglobalization sentiments The global supply chains are characterized by high instability and uncertainty According to the theory of scope economics，building diversified supply chains can enhance enterprises sensitivity to market supply and demand changes，serveing as an effective strategy to mitigate supply chain security However，existing literature has insufficiently explored the strategic motivations，particularly institutional factors，behind the diversification of supply chain configurations by Chinese enterprises
Against this backdrop，this paper takes the negative list system gradually implemented in 2016 as a quasinatural experiment to systematically investigate the impact，mechanisms，and economic consequences of relaxing market access restrictions on the diversification of supply chain configurations among Chinese enterprises It is found that relaxing market access restrictions significantly promotes the diversification of enterprise supply chains，primarily through enhancing market competition and improving resource allocation Specifically，the effect of relaxation market access regulations is more pronounced in promoting the diversification of upstream supply chains，particularly in regions with high market segmentation，central and western regions，and enterprises with stronger market positions Finally，considering the dual effects of supply chain configuration diversification，this paper further extends its focus to supply chain resilience，revealing that the diversification driven by relaxed market access restrictions helps improve the resilience of the supply chains in which enterprises operate
The contributions of this paper are as follows：（1） From the perspective of supply chains，it analyzes the impact and mechanisms of relaxing market access restrictions on the diversification of supply chain configurations among Chinese enterprises，enriching the literature on the microeconomic effects of relaxing market access regulations （2） Recognizing that while supply chain configuration diversification can to some extent avoid the risk of “chain breakage”，it may also increase the operational burden on enterprises，making it difficult for them to quickly adjust their business strategies in the face of risk impacts This paper further extends to its relationship with the resilience of enterprise supply chains，providing a realistic basis for objectively understanding the supply chain effects of relaxing market access regulations In summary，this paper not only offers theoretical support for the construction of a unified national market，but also provides important policy insights for enhancing supply chain security and resilience

Key words:

market access, 
	                                    	                            											                                       supply chain configuration, 
	                                    	                            											                                       market competition, 
	                                    	                            											                                       resource allocation, 
	                                    	                            											                                       supply chain resilience