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1.
基于2004—2016年30个省市的省际面板数据,运用生产函数法测度要素市场扭曲指数,引入地区人力资本、RD投入、城镇化水平、经济发展水平、基础设施建设以及外商直接投资作为控制变量,研究要素市场扭曲、对外直接投资与产业结构之间的关系。研究表明:中国存在着要素市场扭曲促进产业结构升级的现象;中介效应模型检验结果表明,要素市场扭曲可以通过促进对外直接投资来促进产业结构升级;门槛效应模型检验结果表明,要素市场扭曲作用于产业结构升级存在着对外直接投资的门槛效应。 相似文献
2.
选用2000—2016年我国30个省市的省际面板数据,实证分析了要素市场扭曲对产业结构优化升级的影响。研究表明:第一,资本、劳动力市场要素价格扭曲现象普通存在;第二,劳动力和资本要素的价格扭曲对产业结构高级化升级存在着负向关系;资本要素价格扭曲对产业结构合理化升级为负向影响,而劳动力要素价格扭曲对其产生正向影响。 相似文献
3.
基于我国2007—2019年省级面板数据，采用固定面板模型考察地方政府经济竞争、生态竞争以及服务竞争对产业结构升级的直接影响，并以绿色技术创新作为中介变量考察地方政府竞争对产业结构升级的传导机制。结果表明：（1）异质性地方政府竞争对产业结构升级的影响存在显著的差异性，经济竞争对产业结构升级有显著的抑制作用，生态竞争和服务竞争对产业结构升级有显著促进作用；（2）中介效应表明存在着“地方政府竞争—绿色技术创新—产业结构升级”传导机制，经济竞争抑制了绿色技术创新、间接抑制了产业结构升级，生态竞争和服务竞争通过提高绿色技术创新间接促进了产业结构升级。 相似文献
4.
制度创新环境与中国绿色技术创新效率 总被引：1，自引：0，他引：1
技术创新要朝绿色化和生态化方向发展。纳入区域污染排放强度,使用SFA的方法测算中国各地区的绿色技术创新效率,之后考察制度环境、要素市场扭曲、资源投入比重、政府行为等因素对绿色技术创新效率的影响。研究发现:(1)中国工业部门的绿色技术创新效率总体呈现上升趋势,东部相比于西部并未表现出较高的绿色技术创新效率;(2)制度环境的优化、地区居民文化素质水平的提升对绿色技术创新效率具有积极影响;(3)要素市场扭曲、政府对创新活动的资助、创新要素的资本化、劳务费所占比重等因素则不利于绿色创新技术进步,企业自有资金比重的升高对绿色创新技术进步的影响也不明显。研究的政策含义是:进一步优化创新的制度环境,发挥市场的价格决定机制,改善要素配置效率是提升绿色技术创新效率的关键。 相似文献
5.
基于2011—2020年中国地级市面板数据,运用多种计量方法探究了数字经济对绿色全要素生产率具的影响及作用机制。研究发现,数字经济对绿色全要素生产率具有显著正向影响,主要推动绿色技术进步。产业结构升级和要素配置扭曲缓解在其中发挥中介作用。数字经济是资源型城市打破“资源诅咒”的关键因素,但数字经济发展不均衡会导致中心城市与外围城市存在“数字鸿沟”。从时间效应来看,产业数字化和数字产业化等数字经济细分维度的发展是绿色全要素生产率提升的持久动力。最后,基于DID模型评估政策效应表明,数字化经济政策也有利于提升绿色全要素生产率。 相似文献
6.
《中国科技论坛》2021,(7)
本文利用2000—2014年世界投入产出数据库(WIOD),基于中介效应模型探讨制造业服务化对产业结构升级的影响。研究发现:(1)制造业服务化有利于产业结构升级,技术创新和服务需求是中介渠道;(2)生产性服务化通过技术创新、服务需求促进产业结构升级,生活性服务化只产生服务需求效应,不能驱动技术创新;(3)7类不同生产性服务化对产业结构升级的影响程度和中介效应强度存在异质性;(4)发达国家服务化通过技术创新、服务需求促进产业结构升级,发展中国家服务化未产生技术创新效应;(5)金融危机前服务化通过技术创新与服务需求影响产业结构升级,危机后技术创新效应不再显著。 相似文献
7.
利用2013—2019年制造企业及新基建面板数据,探究新基建对企业绿色技术创新的影响机制以及产业集聚的调节效应,主要研究结果如下。目前大量投入信息基础设施建设总体上能有效促进企业绿色技术创新的“量质齐升”,对高质量绿色技术创新尤为有利,并且在以制造业产业集聚水平为门槛进行的检验中得到佐证;但产业集聚存在的拥堵效应会阻碍这一促进进程。从总体看,融合基础设施投入对企业绿色技术创新“量与质”的提升具有显著的促进作用,但在不同地区和工业化水平上表现差异较大。融合基础设施显著提升东部企业以及工业化程度较高省份企业的绿色技术创新能力,但对中西部和工业化程度较低省份的企业尚未显现促进作用;产业集群的规模效应会抵销部分融合基础设施之于工业化程度较高省份企业绿色技术创新的积极影响。研究样本期间内,仓促加大创新基础设施建设投资不利于企业绿色技术创新“量质齐升”,但产业集聚的扩散效应能从总体上缓解这种不利影响。当制造业产业集聚水平跨越1.335的拐点后,增加创新基础设施建设投资会极大促进企业高质量绿色技术创新。研究结论可为重点规划布局新基建投入类型与企业绿色转型营造良好条件环境提供参考借鉴,助力我国产业结构升级。 相似文献
8.
为向进一步落实兼顾创新与绿色双重发展理念提供理论和现实依据,利用2011—2020年中国280个地级市的面板数据,从禀赋效应、赋能效应、治理效应和社会效应4个方面,通过固定效应模型和中介效应模型探讨数字经济对绿色技术创新的影响效果和传导机制,同时从城市区域、经济规模和绿色技术创新水平角度分析其异质性影响。结果发现：280个城市的数字经济显著促进绿色技术创新发展,其主要通过制造业要素密集转型升级和制造业污染密集转型升级间接促进绿色技术创新的发展;数字经济对绿色技术创新的影响存在异质性,相比东部地区、经济规模和绿色技术创新水平较低的城市,数字经济对中西部地区、经济规模和绿色技术创新水平较高城市的绿色技术创新促进作用更为显著。由此建议政府加大数字经济发展所需的财税、金融、保险、法律等配套制度保障力度,同时进一步优化数字经济应用场景,并且“因城施策”,推动区域制造业产业实现绿色转型。 相似文献
9.
本文基于2002-2013年中国省际面板数据,采用非线性面板门槛模型,以环境规制和技术创新为门槛变量,实证研究环境规制、技术创新对产业结构升级的影响。研究表明：无论环境规制强度和其他因素变化与否,只要技术创新水平提高,就会促进产业结构升级;高强度环境规制对技术创新具有倒逼作用,有助于推动产业结构升级;环境规制依赖于产业技术创新水平的高低而对产业结构升级产生不同影响;市场化和人口受教育程度越高越有利于产业结构升级,固定资产投资对产业结构升级具有负向作用,外商直接投资和城镇化对产业结构升级影响不显著。最后本文提出政策建议。 相似文献
10.
在供给侧结构性改革凸显动能转换的时代背景下,本文基于2006—2017年我国30个省份动态面板数据,实证检验了技术创新对我国居民消费升级的影响以及产业结构调整的中介作用。研究发现：(1)作为供给侧结构性改革的核心,技术创新对两类消费升级产生了显著的正向影响。创新效率越高,越有助于促进我国居民从温饱型消费向发展型和享乐型消费过渡;(2)消费升级存在时间黏性,当期消费会受到往期消费水平的正向影响,而技术升级有助于打破这种黏性,助推消费升级;(3)产业结构升级在技术创新和消费升级之间存在显著的中介效应,体现了技术进步、产业结构调整对拉动内需的“引擎”作用。 相似文献
11.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
12.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
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. 相似文献
13.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
14.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US 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 the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
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. 相似文献
15.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
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. 相似文献
16.
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. 相似文献
17.
Puay Tang 《The Information Society》1998,14(1):19-31
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. 相似文献
18.
Milton Mueller 《The Information Society》2001,17(3):151-163
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. 相似文献
19.
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.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
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. 相似文献
20.
Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献