浅谈大学数学教学

要做好大学数学的教学改革，就应衔接好大学数学与高中数学的教学内容，在教学过程中引导学生认识数学的文化价值和数学美，渗透数学实验思想，逐步培养学生的科研意识。     

How does political connection affect firm financial distress and resolution in China?

We examine the impact of political connections on firm performance, financial distress, and its resolution in China, a country where government influence over stock markets has been demonstrated to be considerable. Our findings suggest that over 1999 to 2015, although political connections had limited impact on the emergence of financial distress, such connections assisted distressed firms in gaining increments to debt financing and contributed to a higher likelihood of recovery. This indicates that Chinese authorities follow market economy principles, and only intervene in firms’ operations after they fall into financial distress. In addition, central and local government political connections have different impacts on distress recovery. We conduct additional analyses on differences in distress outcomes for various ownership (State-owned enterprises, SOEs, and non–SOEs) and sample sub-periods (1999–2007 and 2008–2015). Our results are robust to potential endogeneity issues and to alternative measures of financial distress.     

The Train has Left the Station: Do Markets Value Intracity Access to Intercity Rail Connections?

Abstract. This paper is the first to provide a micro‐level analysis of the impact of intercity rail connections on property prices. We use the variation in mainline accessibility provided by the reorganization of the rail system in post‐unification Berlin to isolate accessibility effects from correlated individual location effects. Evidence does not support the existence of localized effects on location productivity and household utility. While the city, since unification, has undergone significant changes in its spatial structure, these effects cannot be attributed to the new transport concept. Our findings question the justification for committing substantial public funds to downtown rail redevelopment projects.     

住宅市场影响下的天津市城乡建设用地增减挂钩风险分析

研究目的：从住宅市场供求均衡的角度对挂钩规模进行判断,分析挂钩所产生的潜在风险,提出合理安排挂钩项目及进程的政策建议。研究方法：住宅市场分析模型和挂钩风险分析模型。研究结果：到2015年,加入挂钩产生的住宅增量后,天津市住宅市场的非均衡度为-1.77,导致挂钩资金平衡难度加大,引发政府潜在债务,延缓挂钩工作进程等风险。研究结论：对于以政府主导型为主的挂钩模式,要认真研究挂钩新增商品住宅开发的市场需求,分析住宅市场影响下的挂钩风险,合理安排挂钩项目以及进程,实现挂钩项目及住宅市场的双重可持续发展。     

基于高铁联系的中国东部城市服务业发展潜力格局——社会网络分析视角

利用东部地区地级及以上城市间的高铁班次数据作为高铁客流联系,以高铁客流联系网络的结构特征表征城市间服务业联系的可达性和干扰机会,以服务业相对规模反映城市服务业对外联系与发展的需求和引力,来综合考察东部城市基于高铁联系的服务业发展潜力等级体系和联系结构。结果表明:①基于高铁联系的东部城市服务业发展潜力存在显著分异,是由南京、上海、杭州、北京等少数全局性节点和广州、深圳等局域控制性节点主导的等级体系,在空间分布上呈多中心圈层结构和集群化联系特征;②尽管高铁联系对服务业发展的促进作用主要体现在服务业相对规模较大的城市中,但并不是服务业相对规模最大的城市获得了最高发展潜力,而是基于高铁网络的对外联系水平极大提高,且邻近服务业相对规模最大城市的次级节点,如南京、杭州;③虽然一定时期内,东部城市基于高铁联系的服务业发展潜力格局仍将被锁定在既有城市群结构和城市等级体系中,但随着高铁网络日益织密,未来东部地区的服务业联系和发展轴带将进一步隆起。     

中国在世界贸易网络中的地位:演进与展望

本文利用社会网络分析法来分析新中国成立以来中国在世界贸易网络中地位的发展变化。新中国成立初期,我国各项网络地位衡量指标在世界各国中的排名都相对落后,1962年我国点出度为48位,点入度为73位,出强度为24位,入强度为33位,核心度为68位。经过曲折发展(1949—1978年)、高速发展(1979—2001年)和高水平发展(2002—2018年)三个阶段,到2018年我国除了入强度排名第二以外,其他各项指标都是排名第一。中国已经从世界贸易网络中的边缘国家成长为核心国家,这充分反映了我国在对外贸易领域取得的巨大成就。随着我国经济迈入高质量发展的新阶段,我国在世界贸易网络中的核心地位也将得到进一步的加强。     

拼凑式金融监管模式的无缝化修正

金融危机后,各国金融监管广受诟病.欧美等发达国家开始转换金融监管思路,从东道国监管和母国监管之争转向对监管契合问题的探索,并从这个角度提出了拼凑式金融监管模式的主流研究概念,认为其固有的监管隔断和空隙的危害性是造成此次金融危机蔓延发展的主要原因.本文试图通过形成超级监管形式、以监管互律来促进监管合作、分层次统一监管等方式,讨论拼凑式金融监管模式的无缝化修正.     

从产业关联看产业结构效应——基于四川省2007年投入产出表数据

利用四川省2007年的投入产出数据,并运用投入产出分析工具,从实证的角度分析各部门的影响力系数、感应度系数、各项最终需求的诱发系数、各部门对最终需求的依存度,剖析了四川国民经济中产业结构的关联程度,揭示了对经济影响较大的产业和各项最终需求的诱发系数较大的产业,并对地区产业结构的调整提出相应政策建议。     

110kV深沟变电站备自投的更新与改造

110kV深沟变电站作为越南送电的桥头堡,在广西防城港电网占据举足轻重的地位,为了满足当地迅速发展的供电要求,改善电网,增强供电能力,文章结合变电站的实际情况对110kV深沟变进行增容扩建,扩建110kV竹坪Ⅱ和芒街Ⅱ出线各1回,并提出一种备自投的实现方式,从而提高了东兴市自身送电及向越南送电的可靠性和经济性。     

Politicians and the IPO decision: The impact of impending political promotions on IPO activity in China

This paper shows that incentives created by the impending turnover of local politicians can accelerate the pace of initial public offering (IPO) activity in certain politicized environments. Focusing on China, we exploit a research setting where politicians are rewarded for capital market development, firms rely on political connections for access to capital, rent-seeking behavior is rampant, and the objectives of the state might not be to maximize capital market efficiency. We find that the rate of exchange eligible firms engaging in an IPO temporarily increases in advance of impending political promotion events. This effect holds for both state-owned and non-state-owned entities. For state-owned firms, the effect is strongest in those provinces where the politicians are more likely to be rewarded for market development activity. For non-state-owned firms, the temporary increase in IPO activity appears to be (rationally) opportunistic in nature, with the effect stronger around events more likely to disrupt the firms' political connections. Promotion period IPOs underperform non-promotion period IPOs in terms of both future financial performance and long-run stock returns, have controlling shareholders who retain a larger fraction of the company, and are more likely to divert proceeds away from their intended use after the offering.