信息披露质量与权益资本成本

利用是否发生财务重述来衡量强制信息披露质量,利用构建的自愿信息披露指数来衡量自愿信息披露质量,考察了信息披露质量与权益资本成本的关系.发现,信息披露质量高的公司具有较低权益资本成本.另外,检验强制信息披露质量和自愿信息披露质量对权益资本成本的联合影响,要优于检验它们各自时权益资本成本的影响.     

碳信息披露对企业价值创造的滞后影响研究

运用演绎推理法和OLS方法对碳信息披露影响企业价值创造的滞后效应进行了研究.先从理论上分析了碳信息披露对企业价值创造存在滞后影响的具体原因,然后从资本市场和产品市场两个角度展开了碳信息披露影响企业价值创造的滞后效应检验.研究发现碳信息披露对企业价值创造的影响存在滞后效应,且在资本市场上这种滞后效应会随着滞后期的增长而更加显著,而在产品市场上这种滞后效应会随着滞后期的增长而减弱.     

信息披露质量与资本产出效率——理论及实证研究

从信息披露质量角度探讨了信息披露质量对资本产出效率影响的机制,并从实证角度探讨了中国股票市场信息披露质量与资本产出效率的关系:发现信息披露质量在1%的显著水平上与资本产出效率正相关,说明提高企业的信息披露质量是提高我国股票市场资本产出效率和资本配置效率的有效途径。     

自愿性信息披露、企业生命周期与权益资本成本

为研究高科技企业自愿性信息披露的3个维度(非财务信息、财务信息和战略信息)在不同企业生命周期中对权益资本成本的影响,运用多元分组回归方法对2013—2017年沪深A股高科技上市公司的定期报告和财务数据进行实证检验,研究结果表明:在自愿性信息披露内部,财务信息和非财务信息能够降低权益资本成本,战略信息对权益资本成本具有正向拉升效应。随生命周期阶段不断演进,企业对3个维度自愿性信息的披露意愿持续减弱,权益资本成本呈现先下降后上升的趋势;财务信息和战略信息的权益资本成本效应呈现出先增强后减弱的变化趋势,并在成熟期达到最强;非财务信息的权益资本成本效应则逐渐减弱。因此,处于成长期和成熟期的企业,应尽可能提高财务信息和非财务信息的披露水平,以求权益资本成本效应最大化,另外战略信息的披露因其对权益资本成本的正向效应,企业在对其披露时要尤为谨慎;政策监管部门应当制定更加标准化的指标体系和内容格式并且连同上市公司积极引导资本市场自愿性信息披露质量水平的向好发展。     

上市公司价值信息披露的经济后果研究

企业价值信息披露具有一定的经济后果,会对资本市场的持续发展产生重要影响。本文以深市上市公司2009年数据为研究样本,从两个方面考察企业价值信息披露的经济后果,分别研究了企业价值信息披露的短期市场反应以及企业价值信息披露与企业价值的关系。本文通过实证研究发现,上市公司价值信息披露会引起股价的短期波动,引起资本市场的正向反应,上市公司价值信息披露水平与企业价值存在正相关关系,说明提升企业信息披露的价值信息含量有助于提高企业价值。     

会计信息披露和资本市场效率的关系研究

在美国金融危机爆发,从而引致全球经济开始下滑的今天,我们无论是从理论研究还是从我们如何建立更有效的资本市场的角度,还是我们建立一种更为广泛意义的会计信息披露制度上,我们都要进行思考和讨论会计信息这个可以影响资本市场发展的一个关键因素,这个因素关系着将来资本市场的建设和完善,关系未来经济的建设和发展的问题.本文在研究了会计信息披露的真实,充分的基础上,得出它的披露程度对资本市场效率的影响到底有多大,二者的关联度如啊.在关系研究的基础上,最终建议如何进行制度改革,使信息披露更加完善,更加合理,从而促进资本市场的发展.我得出的结论就是我们在发展资本市场的同时,必须同时跟进对会计信息披露制度的改革,使二者可以相得益彰的发展,使二者在一个良性循环的轨道上共同进步.     

创新信息披露、分析师跟踪与市场反应研究

本文以创业板公司为研究对象,考察资本市场对企业创新相关信息披露的反应及分析师跟踪的调节效应。研究发现企业创新信息披露能增强投资者的价值认同,分析师跟踪有助于提升市场效率,但有作用条件。具体表现在:分析师跟踪能加强投资者对创新优势信息的认知,但在创新内容信息披露方面只有明星分析师才传递了增量信息,并受投资者信息解读能力的影响。结论表明我国证券分析师是有市场影响力的,但大多数分析师的深度信息挖掘和解读能力有待加强。本文研究拓展了信息披露影响市场效率的途径,增补了分析师作用的经验证据,对企业信息披露决策和资本市场分析师角色识别有一定的启示。     

我国融资融券制度提高公司非财务信息披露质量了吗?——基于上市公司社会责任报告的经验证据

公司社会责任问题近年来日益引起社会公众的关注,因此如何提高社会责任信息的披露质量成为影响我国资本市场健康发展的重要课题.借助中国资本市场融资融券制度推出这一“自然实验”,结果发现,卖空机制对管理层可以发挥监督制约作用,改善公司的治理环境,从而提高公司社会责任信息披露质量.进一步地研究显示,由于未经第三方鉴证的社会责任报告可靠性较差、披露质量较低,因此卖空机制的引入对这类公司的社会责任信息披露质量的提升作用更明显;在市场化程度较高的地区,融资融券交易更为活跃,卖空机制的引入能更显著地提升公司社会责任信息披露质量.     

上市公司盈利预测信息的自愿性披露:动因、效果及制约因素

本文对上市公司自愿披露盈利预测信息的动机、效果及制约因素进行了探讨。研究结果表明，自愿披露盈利预测信息在改善与投资者关系、降低筹资成本等方面具有积极作用，而盈利预测信息的供求结构、资本市场的竞争强度、信息披露成本以及经理人市场发展水平等因素制约着上市公司管理层披露盈利预测信息的意愿程度。最后对改进我国上市公司盈利预测自愿披露制度提出了建议。     

上市公司自愿性信息披露的动机分析

自愿性信息披露是体现资本市场信息有效性的重要手段,是许多大公司展示“核心竞争力”、沟通利害相关者、描绘公司未来的有效途径。文章结合国内外对自愿性信息披露的研究以及我国上市公司的信息披露状况,对上市公司自愿性信息披露的动机进行分析。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence     

Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels

<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese     

More than Skin Deep – Understand Skin Biology by Means of Dermatogenomics

<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages.