基于关键节点与关键路径的专利集群网络演进研究

专利作为技术和知识的重要载体，是研究技术演进和产业发展的重要信息源。目前缺乏针对专利集群网络中关键节点与关键路径中节点的比较分析和技术知识挖掘。构建基于关键节点和关键路径的专利集群网络演进模型，从两个层面综合分析技术演进特征。检索德温特数据库(Derwent Innovation Index)得到碳化硅肖特基势垒二极管（SiC-SBD）相关专利作为实证数据，时间跨度为1986-2017年。结果表明，SiC-SBD专利集群网络经历了萌芽期、成长期、成熟期和衰退期，其中，萌芽期专利主要涉及基础技术，成长期为器件结构，以完善器件结构、改进二极管性能为主要研究方向。近年来SiC-SBD专利年增长率下降，技术发展速度放缓，专利价值更多体现在其商业价值上。SiC-SBD专利集群网络关键节点与关键路径中节点重合度较高，核心专利识别可通过多视角分析得到。通过关键节点与关键路径分析专利集群网络演进过程，有助于更全面呈现技术演进过程，为决策者识别核心专利、预测技术发展提供参考。     

复杂担保经济后果与作用路径研究

本文以2008-2019年A股上市公司为样本,研究了参与复杂担保对上市公司产生的经济后果,并探讨了引发这些经济后果的路径机制和影响因素.研究发现:首先,参与复杂担保会对上市公司个体的公司价值和盈利能力产生显著的负向影响,且复杂担保内担保链条越多或上市公司在复杂担保内居中程度越高时,负向影响越大.因股东资金占用导致的投资不足在复杂担保影响公司价值和盈利能力的过程中发挥了部分中介效应.其次,复杂担保极易产生负向效应的多向和无序传播,形成风险传染,具体表现为系统内公司之间价值和盈利变动的连带反应,且较差的信息质量以及关联担保行为都会进一步加剧风险传染,产生这种现象的原因是风险冲击后复杂担保内其他上市公司风险承担水平降低、融资约束程度增加.本文从新的视角深化了担保后果及其作用路径的相关研究,对于深入理解复杂担保行为本质,以及如何警惕担保异象、防范担保风险具有重要意义.     

基于限制因素组合序列的耕地质量提升潜力研究*——以什邡市为例

[目的]通过分析什邡市耕地质量现状,充分把握影响耕地质量的主导因素并进行质量提升分区,测算不同质量提升区的提升潜力,以期为全市耕地质量的建设与发展指明方向。[方法]依据农用地分等理论,构建2014年什邡市耕地质量限制性指数评价体系,采用限制性指数模型测算耕地质量限制性指数,结合因素组合法、耕地质量潜力测算法,分别进行耕地质量提升分区及其提升潜力评价。[结果]什邡市耕地质量现状差异显著,地域分布特征明显;因素限制程度以中限制为主,多因素共同主导限制耕地比重大;各质量分区限制特征明显,各区耕地质量提升潜力在时序上和空间上也存在差异。高等别耕地集中分布于南部平原,受土壤酸碱度中等限制和剖面构型高程度限制为主;北部丘陵区以及南部河谷低洼地带主要为低等别耕地,表现为坡度与灌溉因素较高程度限制为主;综合提升潜力较大的耕地集中于北部丘陵区与南部河谷低洼地带。[结论]什邡市范围内耕地质量差异明显,存在普遍限制且分区限制特征明显,各区提升潜力空间差异明显。     

Gold price dynamics and the role of uncertainty

This study focuses on the dynamics of the gold price against bonds, stocks and exchange rates based on a disaggregation of the underlying relationships across different frequencies applying a wavelet decomposition. To analyze joint extreme movements (i.e. tail dependence), we adopt a copula approach, which helps us to assess the dependence between the returns of gold and other assets in calm and turmoil market times and therefore the hedge and safe haven functions of gold. We also examine whether gold prices are directly affected by changes in macroeconomic uncertainty, economic policy uncertainty and/or CPI forecasters disagreement. Analyzing data for nine economies for a sample period starting in 1985, we find that the role of gold changes significantly after the collapse of Lehman Brothers in 2008. Gold is unable to serve as a hedge or safe haven in the classical sense while the findings for the period prior to 2008 mostly suggest that gold is able to shield investors. Uncertainty measures display a surprising and time-varying relationship with the path of the gold price. While economic policy uncertainty is positively correlated with gold price changes, macroeconomic uncertainty and inflation uncertainty among forecasters are both negatively related to gold price changes.     

A critical review of the 2015 South Korean civil service pension reform

The Republic of Korea’s civil service pension (KCSP) was established in 1960 and has been changed several times to overcome the serious financial burdens it has placed on the country. Major problems related to the KCSP include its structure (low contribution and high benefit) and the country’s rapidly aging population. The authors examine the 2015 KCSP reform, reviewing the reasons for the reform, its process, and its fiscal and policy implications. Reforms in other countries are briefly compared. The paper provides important lessons for researchers and practitioners involved in public sector pension reforms.     

推动消费升级 引领经济发展——创新江苏消费经济发展新阶段

2018年9月,中共中央、国务院联合发布《关于完善促进消费体制机制,进一步激发居民消费潜力的若干意见》文件。文件根据习近平中国特色社会主义思想,认为“消费是最终需求,既是生产的最终目的和动力,也是人民对美好生活需要的直接体现。”对消费在国民经济中的重要作用进行了深入阐述,将扩大和升级消费放在战略高度来进行谋划和部署,为今后如何进一步发展国民消费指明了前进方向。改革开放以来,江苏省的消费与全国一样发生了巨大变化,但是我们也应看到,江苏消费虽然增长较快,但是与党和国家的要求还存在一定的差距,消费能力、消费意愿、消费供给消费三要素的发展不充分,在消费水平、消费规模和消费结构等方面还存在一定的问题,在满足人民日益增长的需要方面还需要继续努力。特别是在推动江苏经济发展上要发挥更大的作用,通过消费对经济的调节、引领、带动机制促进江苏经济创新发展。因此,我们要继续贯彻党和国家“两个一百年”、江苏率先小康的“强富美高”战略目标,采取得力措施来解决消费矛盾,激发居民消费潜力,通过消费升级使江苏消费和经济均上升到一个新阶段。     

Shrouding Add‐On Information: An Experimental Study*

We explore how increased competition affects firms’ obfuscation strategies in a laboratory experiment. Firms sell a base good and an add‐on product. Besides choosing the base‐good price, sellers take an action that mimics the effects of shrouding the add‐on product. Shrouding is an equilibrium but an unshrouding equilibrium coexists. In our experiment, more competition matters, in that only duopolistic markets are frequently shrouded whereas four‐firm markets are not. With repeated interaction, shrouding rates do not increase. However, the opportunities to shroud facilitate tacit collusion on the base‐good price for the duopolies: the unshrouding equilibrium serves as a credible punishment if deviations occur.     

民生银行不良贷款问题探讨

不良贷款率的增长加大了商业银行的经营风险。以在A股上市的中国股份制商业银行中不良贷款情况比较典型的中国民生银行为研究对象,分析其不良贷款现状及成因,提出了加大处置力度,强化队伍建设;业务重点管理,质量实时监控;完善地区评级系统,合理调整信贷投入等改进建议。