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研究选取我国东部、中部、西部3个城市的216名消费者,运用实验经济学的方法得到数据,并通过计量模型分析不同转基因食品政策下消费者对转基因食品和非转基因食品支付意愿差异。得出结论,相对于无信息政策,有信息时,消费者对转基因食品支付意愿更小;相对于自愿标识政策,强制标识政策下,消费者对非转基因食品支付意愿更大。 相似文献
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信息不对称下转基因食品消费的演化博弈分析 总被引：1，自引：0，他引：1
信息不对称的存在使得转基因食品销售者和消费者存在博弈关系。针对转基因食品销售者和消费者的策略选择,运用博弈的分析方法对转基因食品消费市场的稳定状态进行深入分析。研究结果表明,转基因食品监管部门加大对转基因食品销售者不诚信行为的处罚力度和检查频率,转基因食品销售者增大真实标识转基因食品的概率能够使转基因食品销售者与消费者良性互动并逐步达到帕累托最优状态。 相似文献
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中国城市消费者对转基因食品的认知程度、接受程度和购买意愿 总被引：27，自引：0，他引：27
我国消费者对转基因食品的态度是一个受到普遍关注的问题。虽然很多学者已经对此进行了研究，但各项研究的结论差异较大。本文根据对我国东部5省11个城市的实地调查数据，深入研究了我国城市消费者对转基因食品的认知程度、接受程度和购买意愿。研究表明，有三分之二的城市居民听说过转基因食品；消费者对转基因技术和食品的知识了解较少；消费者对转基因食品的接受程度和购买意愿较高，但对不同类型转基因食品的态度存在较大差异；消费者对转基因食品的了解程度、收入水平、所居住城市的规模等是影响消费者对转基因食品态度的重要因素。 相似文献
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作为一种利用新技术生产的食品,国内外对转基因食品安全性的争论从来就没有停息过.研究发现,转基因技术是有助于解决粮食危机、降低环境污染、增加农民收入、改善食品结构和功能、缓解全球气候变化的一个重要发展方向.中国应在确保安全和消费者自主选择的前提下,积极开发转基因食品. 相似文献
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转基因食品的标签与知情选择的伦理分析 总被引：4，自引：2，他引：4
由于转基因食品(geneticallymodifiedfoods,GMF)可能有潜在危险,许多国家和消费者要求对转基因食品贴标签,以便消费者能在知情的基础上做出自由选择。但有些国家像美国和许多生产商、销售商不愿意贴标签,他们认为转基因食品与传统食品一样安全,没有必要进行标识。本文对转基因食品的标签与知情选择(labeling＆informedchoice)的概念问题作一个简单的阐述,对其伦理问题作了重点分析并进行哲学反思,结论是应该对转基因食品进行标识,以尊重消费者的知情选择权。 相似文献
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目前世界各国对转基因食品的政策主要有“自愿加贴标签”和“强制加贴标签”两种.通过构造两种政策背景下的消费者消费行为模型深入探讨了两种标签政策对消费者福利影响得出结论,在我国现有的务件下,应该对转基因食品采取强制加贴标签政策. 相似文献
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根据《农业转基因生物标识管理办法》(以下简称《办法》)的要求，厦门市消委会对厦门市场上销售的大豆及其制品的转基因食品标签、标识进行了调查，并对《办法》第一批实施标识管理的农业转基因生物目录和涉及商品的执行情况进行了调查。此次调查历时一个月，在厦门岛内外选择了不同区域的多家超市、零售店、豆腐作坊进行调查，结果发现，“第一批实施标识管理的农业转基因生物目录”商品的生产单位基本上没有按照《办法》的要求进行标识。被调查的133种商品中，99．25％的商品均没有标明是否含有转基因成份。其次，调查中发现销售单位对什么是转基因成份并不清楚。此外．根据《办法》的规定，要求使用“文字标识”，却没有规定标识应标注在外包装上的什么地方，这种由企业自定的方法，不方便消费者查找标识。厦门市消委会对市场转基因食品的调查，其目的就是希望有关部门规范商品标识，再度引起社会对转基因食品的关注，保障消费者的知情权和选择权。 相似文献
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转基因食品标签管制与消费者的知情选择权 总被引：6，自引：2，他引：6
转基因食品的标签管制在国内外引起了广泛的争论,很多组织和某些国家政府都强调通过强制性的标签政策保障消费者的知情选择权。但是本论文通过对国内外进行的一系列调查进行分析,发现消费者对于转基因食品的态度是多元化的。强制性标签制度在保护不喜欢转基因食品消费者利益的同时,却提高了食品成本,让全社会承担了成本,并不能真正的给消费者以知情选择权。分析表明,自愿性标签制度才能真正保障消费者的知情选择权。 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
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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
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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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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
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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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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
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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
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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