Constructing and exploring the evolution mechanism of an industrial innovation ecosystem in resource-based cities (RBCs) is the most effective way to solve the contradiction between economic development, energy shortage, and environmental degradation. Taking 10 typical RBCs in Shanxi Province as examples, this paper used the method of system dynamics (SD) to build a model of the industrial innovation ecosystem of RBCs and set up scenarios to simulate and predict the evolution of the industrial innovation ecosystem of RBCs. The results showed that the industrial innovation ecosystem of RBCs is a complex system composed of four subsystems: innovation players, innovation content, innovation resources, and innovation environment. In innovation players, the increase in the amount of talent has a more obvious effect on technology level and GDP than R&D funding. In innovation content, the improvement of management level has a slow and continuous positive impact on GDP. Technology achievements, once implemented, will improve GDP more than management progress does. In innovation resources, human capital has greater potential for an increase in GDP and per capita consumption expenditure. In innovation resources, technology level plays an important role in slowing down the deterioration of the ecological environment. This study enriched the theoretical paradigm of the research on the industrial innovation ecosystem, and provided effective strategies to solve the development problems of RBCs.

With the rapid development of industrialization and urbanization, returning-home entrepreneurship has received increasing attention from social and academic circles. This paper adopted the method of descriptive statistics to analyze the current situation, and the process by which entrepreneurs in the returning-home entrepreneurship ecosystem participate in the development of entrepreneurial opportunities from two dimensions: resource acquisition and institutional support. This research adopted the method of social network analysis to explore the mechanism of opportunity development of each subject of the returning-home entrepreneurship ecosystem. The results showed that during the opportunity development of returning-home entrepreneurship, all the subjects in the returning-home entrepreneurship ecosystem participated with their own resources and capabilities and jointly promoted the development of opportunities. During the development of these opportunities, each subject in the returning-home entrepreneurship ecosystem participated in different ways and with different emphases. This paper enriched the integration research of returning-home entrepreneurship theory and innovation ecosystem theory, and provided a reference for realizing rural revitalization and promoting regional economic development.

As China is the largest importer of wastepaper in the world and is highly dependent on the international market, the relationship between the Chinese and international wastepaper markets affects the stability of both markets. The purpose of this study was to investigate the impact of China's newly implemented wastepaper polices on the degree of integration between the Chinese and international wastepaper markets and analyze the dynamics of the relationship between the two markets over time. We developed both the static and dynamic total spillover indices to analyze the degree of integration in average and in time-varying perspectives and performed E-Divisive with Medians (EDM) on the dynamic total spillover index to evaluate the impacts of the new policies. The results revealed that the Chinese and international wastepaper markets were integrated. The calculated dynamic total spillover index varied widely during the studied period and presented an overall declining trend, indicating that these policies have disrupted the integration relationship between the two markets. The results of EDM detected structural breaks in the dynamic spillover index due to the new policies, further confirming and describing the negative impacts of the new policies on the integration relationship between the two markets. Since mutual dependence exists between the Chinese and international wastepaper markets, the interventions on the integration relationship have led to dramatic fluctuations and expanding price differences between the two markets, imposing risks and uncertainties on the stable development of China's paper industry and the global recycling industry.