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近期,由于黄金期货的推出,打破了国内黄金市场旧有的以黄金实物即期交易为主体的一元市场结构,增加了以黄金期货为主导的黄金合约远期交易市场。这种二元市场结构为投资者拓宽了黄金投资渠道,丰富了黄金投资手段。按照这两个市场不同的交易机制划分,黄金市场的投资品种可以分为两大类:一是黄金实物投资品 相似文献
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中国城乡二元经济结构的转化趋向及影响因素——基于产业和空间两种分解方法的测度与分析 总被引：1，自引：0，他引：1
合理划分城乡部门是研究二元经济结构的前提。改革开放以来,乡镇企业的蓬勃发展改变了城乡部门构成,这对研究中国城乡二元经济结构问题提出了挑战。本文综合利用产业和空间两种方法划分城乡部门,在此基础上通过城乡部门劳动生产率差异指标来测度城乡二元经济结构的转化趋向,并且分析了城乡资本产出率差异和资本劳动比差异对于城乡二元经济结构强度的相对影响。研究结果表明,改革开放以来乡镇企业的发展有力地推动了城乡二元经济结构转化,而现代农业发展滞后则对城乡二元经济结构转化起到了阻碍作用;资本劳动比差异是影响城乡二元经济结构强度的主要因素,资本产出率差异的影响呈上升趋势。 相似文献
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我国城乡经济关系的评价及分析 总被引：3，自引：0，他引：3
本文通过对我国城乡经济关联强度和协调系数的测度,考察了城市互动发展模式的类型及其地域分异现象,并尝试通过寻找市场化、工业化与城市化之间的内在逻辑关联,来解释中国的城乡二元结构关系的转型及其空间差异,揭示城乡互动发展的空间变化规律.显然,这种分析和解读有助于我们更好地理解我国新型城乡关系的本质,探索适合各地实际情况的城乡良性互动、协调发展的模式. 相似文献
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二元结构下的城乡消费差异分析及对策 总被引：4，自引：0，他引：4
二元结构是指发展中国家社会中政治、经济、文化、教育等多方面结构的断层和分化。由于计划经济体制的影响，我国的城乡二元结构比一般发展中国家更为突出。本文将城乡消费差异纳入二元经济结构中加以考察，并运用垄断厂商逐利行为导致的供给歧视理论对城乡消费差异进行了数理经济分析，发现城乡消费差异不仅是因为二元结构的体制原因，还有垄断厂商供应歧视的经济动因。因此，要建设城乡互动的和谐社会，除了要消除二元结构的体制格局外，还要规范厂商行为、扩大农村商品流通、引导农民消费行为，也许这种规范和引导会成为最终消除城乡二元结构的重要政策选择。 相似文献
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本文分析了我国现阶段农村金融市场的现状及其在农村市场中发展滞后的原因,阐述了我国城乡"二元经济"结构决定了要建设一个不同于城乡金融"一盘棋"的城乡"二元金融"结构,以促进社会主义新农村的建设。 相似文献
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新疆城镇化有利于破除城乡二元经济结构、缩小地区差距、促进民族团结、培育区域增长极、优化资源配置和经济结构;因此,城镇化在推进新疆跨越式发展和长治久安进程中扮演着极其重要的角色。利用状态空间模型分析了改革开放30年来新疆产业发展、财政支出、人力资本积累影响城镇化的动态特征,并在此基础上提出相应的政策建议。 相似文献
8.
国内外R&D管理比较研究及对中国科技资源配置的启示 总被引：16，自引：0，他引：16
根据IMD1997世界竞争力报告提出的评价科技竞争力五个子指标体系 ,本文分别从四个角度 :R&D资源投入规模 ,R&D投资收支结构、R&D成果产出效率、R&D技术管理水平对国内外R&D管理进行了比较研究 ,从而提出了中国科技资源配置的启示 :规模不足、结构失衡、效率不高、机制欠佳的问题。 相似文献
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我国目前面临的发展不平衡问题不仅涉及到区域之间更涉及到区域内部的城乡不平衡现象,这些不平衡现象已经使中国经济的发展受到限制因而引起了学者的普遍关注,本文从发展经济学与区域经济学的角度来分析研究我国二元经济结构的区域特征,并提出相应建议。 相似文献
10.
医疗资源的安排与配置,一直都是公共卫生领域的研究重点之一.近年,公众"挤大医院"的情况时有发生,这反映了医疗资源的供给和分配与医疗资源的获取间的一些矛盾.本文拟就从分析理想状况下的医疗资源配置情形入手,对比分析现在的"大医院热"现象背后的医疗资源的配置的不合理性,并给出一些政策建议. 相似文献
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《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
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《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
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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
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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
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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