共查询到20条相似文献，搜索用时 156 毫秒
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方海燕 《金陵科技学院学报(社会科学版)》2008,22(1)
以具有R&D产品的双寡头竞争模型为基础,研究了产品差异化市场情形下企业R&D策略行为的绩效.从利润最大化角度来看,企业总应该选择R&D卡特尔策略.在知识产权保护程度较高且产品是策略替代条件下,从产品产量与质量的角度考虑,政府部门愿意让企业选择R&D竞争.在知识产权保护程度较低条件下,R&D卡特尔比R&D竞争更能推动产品质量、产量和企业利润的提高,并且可以改善社会总体福利,因此,政府部门愿意让企业选择R&D卡特尔策略. 相似文献
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大型制造业企业是我国经济创新的重要推动力,提高大型制造业企业的投入产出效率有利于促进经济创新。采取DEA模型对我国大型制造业企业20个行业的R&D投入产出效率进行定量评价,实证研究发现,我国大型制造业企业R&D投入产出效率普遍低下,不同行业之间的效率差异大。为了提高我国大型制造业企业的投入产出效率水平,缩小行业间的差距,必须优化资源的配置结构,推动产业集群的产生和发展,实施创新发展战略,促进"政—用—产—学—研"的系统合作,建立人才培养机制,提高R&D活动主体的素质。 相似文献
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研究了双寡头市场条件下,基于不完美定向的定向广告竞争模型.通过两阶段博弈来描述新产品或升级产品引入时不完美定向对企业广告及定价决策带来的影响.第一阶段通过价格竞争辨识消费者,第二阶段广告作为传递产品信息和价格歧视的工具.比较分析不完美定向与完美定向情况下企业的广告和定价策略,均衡结果显示:在不完美定向条件下,当广告成本足够低时,会出现在完美定向情境下不可能出现的均衡,即两企业均会选择向对方的优势市场投入广告.这一均衡的存在会导致2种相反的结果:当广告成本较高时,不完美定向能缓和价格竞争并增加企业利润;但当广告成本足够低时,随着不完美定向程度的增加,反而会加剧市场竞争并导致企业利润损失,因此,企业有动机降低定向误差的程度. 相似文献
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《东南大学学报》2016,(4)
考虑到国外企业的技术领先优势,在政府给予国内企业研发投入补贴和产品补贴2种情形下,分别建立了混合双寡头三阶段博弈模型,分析了国外企业竞争下的国内企业研发补贴策略.得出了在研发投入补贴与产品补贴情形时国内企业的均衡产出、研发投入、最优社会福利以及政府的补贴总额.结果表明,研发投入补贴策略下的均衡产出和最优社会福利比产品补贴策略下的均衡产出和最优社会福利低;研发投入补贴策略下的最优研发投入低于产品补贴下的最优研发投入;研发产品补贴策略对企业研发投入具有更明显的激励效应.在国外企业技术领先优势下,政府为激励国内企业研发创新提供产品补贴策略要优于研发投入补贴策略. 相似文献
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以具有产品R&D的双寡头竞争模型为基础,研究了产品差异化市场情形下企业R&D策略行为的绩效。从利润最大化角度来看,企业总应该选择研发卡特尔策略。在知识产权保护程度较高且产品是策略替代条件下,从产品产量与质量的角度考虑,政府部门愿意让企业选择研发竞争策略。在知识产权保护程度较低条件下,研发卡特尔比研发竞争更能推动产品质量、产量和企业利润的提高,并且可以改善社会总体福利,因此,政府部门愿意让企业选择研发卡特尔策略。 相似文献
6.
周安平 《江苏经贸职业技术学院学报》2003,(3)
机会成本指出,获取的前提是放弃;沉没成本带来的启发是:不要沉湎于已经失去的东西和不要徒劳地挽回无法挽回的损失;效用最大化与利润最大化理论指出:当商品没有效用时是效用最大的时候。当产品不赚钱时是钱赚得最多的时候。从本质上说,消费者均衡与生产者均衡的条件是一样的。 相似文献
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从人力资本、融资环境、交通基础设施、外向型经济水平四个维度引入吸收能力转换变量构建PSTR非线性模型,利用珠三角9个城市2006-2015年的数据分析了OFDI的动态非线性逆向技术溢出效应。研究发现,四个维度都呈现出单一的门槛水平。高体制水平区域的吸收能力变量值高于相应的门槛水平时,OFDI显著的提升区域技术创新能力。区域吸收能力变量值与OFDI逆向技术溢出效应之间存在一个非线性动态转换机制。不同城市在不同的吸收能力变量方面,表现出差异化显著的超越门槛值比例。对外开放度和人力资本变量对于区域吸收能力及技术进步的影响效应最大。本文最后建议进一步深化对外开放格局,提升区域人力资本水平,完善企业融资环境和促进区域物流畅通。 相似文献
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《宜宾学院学报》2019,(2):77-84
基于2005-2014年中国省际面板数据,构建了以城市化水平为门槛变量的回归模型,实证检验了外商直接投资对中国碳排放影响的门槛效应,结果表明外商直接投资对碳排放影响具有明显的城市化水平双门槛效应:当城市化水平未跨越第一个门槛值时,引进外商直接投资会导致碳排放量增加;当城市化水平跨越了第一个门槛值进入中期阶段时,引入外商直接投资虽然会促进碳排放的增加,但是系数在降低且并不显著;当城市化发展水平跨越第二个门槛值进入了后期阶段,外商直接投资的增加会抑制碳排放上升。因此,各地区应根据城市化水平所处阶段,因地制宜地制定外商直接投资引进政策,积极发挥外商直接投资对碳减排的正向效应,以实现绿色低碳可持续发展。 相似文献
10.
董国新 《职教通讯(江苏技术师范学院学报)》2004,10(1)
在知识经济时代,生产力得到飞速发展.要使知识有效地应用于生产,需加大对企业R&D及高校科研活动的投入.发展校办企业,要充分利用校企依托高校的优势,采用"低成本,高差异"产品策略,开发核心技术,实现技术创新,确立其核心竞争力,使企业利润最大化. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献
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The awareness of individualism can be traced back to the period of American Revolution when the Declaration of Independence was produced.It expressed basic beliefs concerning freedom,equality,democracy,privacy and the relationship between people and government,which were exactly what the philosophy of individualism mostly dealt with at that time.This paper is to exploit the essence of individualism by analyzing the Declaration .The analysis enables us to reconsider its significance to the issue of America human rights and foreign policies. 相似文献
20.
Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献