A股“垃圾股”退市难的原因及对策分析

退市难一直是A股的难题,退市率极低。由于退市制度设计缺陷、IPO非市场化及监管不到位等原因,致使“垃圾股”的“壳”价值高,上市公司保“壳”冲动高。在当前IPO加速的背景下,科学合理地提高退市率,积极完善退市制度,使A股形成“有进有出”的良性生态环境是亟待解决的问题。     

基于物联网技术的智能交通控制系统研究

作为物物相连的互联网,物联网通过信息传感设备,把互联网与任何物品相连接,为构建智能交通信号控制与采集的体系提供了可能。论文从基于物联网的智能交通系统整体框架入手,并着重分析其在交通控制和信号采集两个子系统中的运用,指出物联网技术将全面提升交通管理水平。     

中国特色社会主义市场经济货币政策体系的形成及演变*

伴随中国特色社会主义基本经济制度的发展，与之相适应的宏观调控机制不断完善。货币政策体系作为其中重要组成部分，在持续深化改革的进程中逐渐演进，成为构建更加系统完备、更加成熟定型的高水平社会主义市场经济体制的重要内容。在货币政策最终目标及中间目标、货币政策工具、货币政策传导机制等方面正在形成与中国特色社会主义基本经济制度相适应的政策体系，并且具有鲜明的中国特色。本文讨论改革开放以来中国货币政策体系的形成、演变过程及特点。     

新发展阶段与建立现代财税体制*

本文基于我国即将进入全面建设社会主义现代化国家新征程的新发展阶段，回顾了党的十八大以来的财税改革经验，锚定“十四五”规划和2035年远景目标，研究了新发展阶段对深化财税体制改革的要求，从深化预算体制改革、理顺央地财政关系、提升现代税收治理、健全债务管理制度、推进财税法治建设五个方面把握中国特色现代财税体制发展，持续为建立现代财税体制提供理论佐证。     

The role of economic structural factors in determining pandemic mortality rates: Evidence from the COVID-19 outbreak in France

Among the majority of research on individual factors leading to coronavirus mortality, age has been identified as a dominant factor. Health and other individual factors including gender, comorbidity, ethnicity and obesity have also been identified by other studies. In contrast, we examine the role of economic structural factors on COVID-19 mortality rates. Particularly, focusing on a densely populated region of France, we document evidence that higher economic “precariousness indicators” such as unemployment and poverty rates, lack of formal education and housing are important factors in determining COVID-19 mortality rates. Our study will help inform policy makers regarding the role of economic factors in managing pandemics.     

基于西门子PLC除尘器粉尘防爆危险源信号检测及预警系统的研究

研发适用于滤袋式除尘器粉尘爆炸危险源信号的实时检测及预警系统。该系统综合应用工业控制、PLC控制、智能测控终端无线传输、云平台数据管理等技术。采用传感器分别监测除尘器运行时的进出风口压差、除尘器运行状态、高压脉冲喷吹压力和箱体温度。当监测信号不在系统预设的合理范围时,PLC输出就地预警信号,监测信号也可通过无线传输模块上传到云平台。运用云平台的数据分析功能,实现除尘器运行状态系统化监测和综合管理。     

本世纪以来的西方经济增长理论

中国经济正处于动能转换的关键时期,需要来自增长理论研究的支持。21世纪以来,经济增长理论的研究取得了显著进步。本文旨在评述增长理论的最新发展,进一步梳理理论脉络和主流观点,为学术研究和经济实践提供参考。本文认为,经济增长理论已逐渐形成制度决定理论、结构转变理论和人口过渡理论三大主流观点。同时,本文指出了增长理论存在的不足。在总结现有文献贡献与不足的基础上,对未来研究方向进行了展望。     

Aggregate and distributional impacts of China’s household responsibility system

It is 40 years since China started to abandon collective farming, with initial rural reforms in 1978 that culminated in adoption of the household responsibility system (HRS). Existing studies of impacts of these reforms do not consider nonrandom spread of the HRS, spillovers from early adopters, or distributional effects. In this paper, the synthetic control method and spatial autoregressive panel models with autoregressive errors are used to estimate impacts of the HRS that account for these features. The HRS had a significant positive effect on grain output and food supply in China, while also helping to reduce regional inequality.     

Agricultural holdings with undefined boundaries,communal systems and counter‐hegemonies: The persistence of the peasantry in Argentina

The presence of agricultural holdings with undefined boundaries (AHUBs) and their heterogeneous geographical distribution questions the supposed hegemony of agribusiness in Argentina. Given the lack of defined boundaries, these holdings generate a communal culture among dwellers, which is reflected in both the strategies of the use of commons and the initiatives for the defence of land in the conflicts between peasants and entrepreneurs. This article describes two counter‐enclosure experiences that were generated and have developed on the bedrock of AHUBs and a communal matrix. Those defence strategies are employed by families that possess the land but have not title to it, being a defence tactic against attempts of eviction. AHUB not only is a new census category that allows us to enhance our knowledge of the rural world but also proposes modes of production that differ from those of the capitalist model, showing possible counter‐hegemonic development alternatives that arise from the practices used in these holdings.     

基于系统动力学的区域林业碳汇市场中三方主体利益行为演化博弈分析

分析影响三者策略行为的作用因素,构建区域林业碳汇市场的演化博弈模型。在此基础上,结合系统动力学理论,对广东省的碳汇发展状况进行仿真模拟,找出影响市场均衡发展的关键因素。结果表明:政府部门趋向于选择投入策略,其中提高市场碳交易额对拉动市场需求有显著影响,而增强对林农碳汇林的补贴力度难以解决市场当前供需问题。