长江经济带软件与信息技术服务业技术创新效率时空演变及影响因素研究

选取长江经济带软件与信息技术服务业相关数据,利用DEA-BCC模型测算软件与信息技术服务业技术创新效率,并借助自然断裂法和Tobit模型分析区域软件业技术创新效率时空演变特征及影响机理。从静态分析结果看,长江经济带软件业技术创新效率在研究期内呈现先升、后降、再升的螺旋上升态势。从动态分析结果看,技术进步是软件业技术创新效率提升的主要原因。软件业技术创新效率在空间分布上有明显的中间凹陷特征,各地区整体技术创新效率明显上升。科技创新水平、产业结构、对外开放水平、信息化水平、人口密度是影响长江经济带软件业技术创新效率的重要因素,且影响程度存在区域差异。     

政府补贴对企业真实创新绩效的影响——基于中国A股上市公司数据的实证分析

在分析政府补贴政策的特征及其影响企业真实创新绩效的理论机制的基础上,运用A股上市公司数据,检验了政府补贴对企业真实创新绩效的直接和传导效应。研究发现：政府补贴对企业真实创新绩效具有激励效应,且国有企业较非国有企业的创新效应更强;研发资本要素市场扭曲能够强化政府补贴激励企业真实创新绩效的调节作用,并与产权性质联合调节政府创新补贴效果;创新投入与融资约束在政府补贴对企业真实创新绩效的影响中起部分中介效应;政府补贴对企业创新持续性具有负向抑制效应,政府补贴效果受到研发资本要素市场扭曲和产权性质明显的负向调节作用,且创新投入与融资约束在政府补贴对企业持续性创新的影响中起部分中介效应。     

数字技术应用、经济政策不确定性与企业双元创新

采用2009—2019年中国A股上市公司数据,从双元创新视角出发,实证检验了经济政策不确定性背景下企业数字技术应用的创新效应。研究表明,数字技术应用能够显著促进企业探索式创新和利用式创新;经济政策不确定性正向调节了数字技术应用与探索式创新之间的关系,但对数字技术应用与利用式创新之间关系的调节效应不显著;数字技术应用的双元创新效应、经济政策不确定性的调节效应会因企业产权性质、所处生命周期及高科技属性的不同而存在差异性。以上研究结论有助于深入理解企业数字化转型在经济政策不确定性下的战略价值,为企业在环境不确定性增强的背景下加快数字化转型进程、释放数字技术的创新赋能效应提供理论依据。     

P2P技术与网络传播的未来

伴随着P2P技术和商业应用的发展,P2P技术对于未来网络传播可能产生的影响也成为一个令 人关注的问题。从目前来看,P2P技术对于网络传播的影响主要包括以下几方面:网络信息共享与 利用的方式与程度将进一步改变;围绕P2P技术思想展开的软件与信息产品开发,将在一定程度上 决定作为媒体的网络的未来面貌;P2P带来的去中心化特点将使互联网管理的难度进一步增加; P2P可能成为媒体间的交流与合作的新平台,也可能加速媒体形态的演化。从总体看,P2P技术未 来的社会影响程度,取决于政治、经济等各种力量的博弈结果,而这也将最终影响着互联网的未来。     

基于风险导向管理的技术创新运行机制研究

市场经济环境要求企业不断地进行技术创新,而在众多的风险影响下,能否有效地掌控不利因素则成为创新实现的关键.为此,文章倡导企业建立以风险管理为导向的技术创新运行机制,以进一步明晰风险动态、合理安排人员到位、灵活开展防治策略,使风险损失最小化而技术创新收益最大化.     

视觉文化时代信息技术与英语教学关系探析

面对视觉文化环境下长大的一代,信息技术在英语教学中作用巨大。多媒体技术能调动学生的学习兴趣、培养联想思维能力以及营造仿真氛围;网络提供教师与学生日常教学中欠缺的资源;网络学习环境有助于学生自主性的形成。媒介素养教育是教师和学生在此背景下之必须。     

A general central limit theorem and a subsampling variance estimator for α‐mixing point processes

We establish a central limit theorem for multivariate summary statistics of nonstationary α‐mixing spatial point processes and a subsampling estimator of the covariance matrix of such statistics. The central limit theorem is crucial for establishing asymptotic properties of estimators in statistics for spatial point processes. The covariance matrix subsampling estimator is flexible and model free. It is needed, for example, to construct confidence intervals and ellipsoids based on asymptotic normality of estimators. We also provide a simulation study investigating an application of our results to estimating functions.     

On a control chart for the Gini index with simulations

In this work we suggest the use of the Gini index on control charts. The asymptotic properties of Gini index are presented and the control charts based on appropriate confidence intervals are constructed. The suitability of the proposed charts are investigated by means of extensive simulations.     

Risking safety and rights: online sex work,crimes and ‘blended safety repertoires’

It has been well established that those working in the sex industry are at various risks of violence and crime depending on where they sell sex and the environments in which they work. What sociological research has failed to address is how crime and safety have been affected by the dynamic changing nature of sex work given the dominance of the internet and digital technologies, including the development of new markets such as webcamming. This paper reports the most comprehensive findings on the internet‐based sex market in the UK demonstrating types of crimes experienced by internet‐based sex workers and the strategies of risk management that sex workers adopt, building on our article in the British Journal of Sociology in 2007. We present the concept of ‘blended safety repertoires’ to explain how sex workers, particularly independent escorts, are using a range of traditional techniques alongside digitally enabled strategies to keep themselves safe. We contribute a deeper understanding of why sex workers who work indoors rarely report crimes to the police, reflecting the dilemmas experienced. Our findings highlight how legal and policy changes which seek to ban online adult services advertising and sex work related content within online spaces would have direct impact on the safety strategies online sex workers employ and would further undermine their safety. These findings occur in a context where aspects of sex work are quasi‐criminalized through the brothel keeping legislation. We conclude that the legal and policy failure to recognize sex work as a form of employment, contributes to the stigmatization of sex work and prevents individuals working together. Current UK policy disallows a framework for employment laws and health and safety standards to regulate sex work, leaving sex workers in the shadow economy, their safety at risk in a quasi‐legal system. In light of the strong evidence that the internet makes sex work safer, we argue that decriminalisation as a rights based model of regulation is most appropriate.     

Social health protection in Cambodia: Challenges of policy design and implementation

The Government of Cambodia is implementing ambitious reform initiatives to improve the country's social health protection system. In January 2018, it was announced that the Health Equity Fund (HEF), which is fully subsidized by a joint government‐donor initiative for the reimbursement of user fees for the poor at public health facilities, is to be expanded to some segments of informal workers belonging to associations, as well as to commune and village chiefs. Since 2017, the National Social Security Fund (NSSF) has provided social health insurance for formal economy workers in enterprises with eight employees or more. In January 2018, it was expanded to civil servants and all employees regardless of the size of the enterprise. However, this article highlights that the new ambitious reforms are not accompanied by careful planning as regards funding, service delivery, human resources and institutional design. This article therefore aims to examine key policy issues and challenges for Cambodia's ambitious reform of its social health protection system in terms of resource generation, population coverage, strategic purchasing and governance.