首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   422篇
  免费   18篇
  国内免费   1篇
财政金融   36篇
工业经济   56篇
计划管理   76篇
经济学   64篇
综合类   31篇
运输经济   4篇
旅游经济   19篇
贸易经济   98篇
农业经济   23篇
经济概况   34篇
  2024年   3篇
  2023年   7篇
  2022年   8篇
  2021年   21篇
  2020年   16篇
  2019年   18篇
  2018年   16篇
  2017年   12篇
  2016年   18篇
  2015年   13篇
  2014年   22篇
  2013年   32篇
  2012年   16篇
  2011年   31篇
  2010年   18篇
  2009年   34篇
  2008年   28篇
  2007年   32篇
  2006年   18篇
  2005年   13篇
  2004年   8篇
  2003年   14篇
  2002年   10篇
  2001年   7篇
  2000年   3篇
  1999年   2篇
  1998年   3篇
  1997年   2篇
  1996年   5篇
  1995年   2篇
  1994年   2篇
  1992年   4篇
  1987年   1篇
  1984年   2篇
排序方式: 共有441条查询结果,搜索用时 15 毫秒
71.
Studies of innovation networking have frequently been concerned with the occurrence of dyadic relationships and with their apparent impact on simple measures of firm-level innovation outputs. This paper takes a more detailed look by analyzing the connection between different types of innovation and forms of networking. Based on the market novelty of innovation outcomes and the extent to which innovation activities require new competences, four types of innovation are identified. It is proposed that these types correlate with various innovation network dimensions, including the volume of networks, the strength and content of ties, and the specificity of ties. Drawing on survey data of 594 innovations realized by Dutch small firms, it is observed that the requirement to access new competences for innovation correlates positively with the number of network partners involved. We also note more subtle connections between types of innovation and networking, including that novel innovation outputs correlate with using network partners as a source of inspiration, whilst new competences associate with networking for knowledge capital. In the latter case, these activities also draw on new and intended ties relatively often, i.e. network partners which are actively sought out for the specific contributions they may make to the innovation process. Finally, innovation which is simultaneously new-to-the market and requires new competences uses strong ties relatively often. Implications for innovation policy and practice are discussed.  相似文献   
72.
Inspired by some works of Kirkby, J. L. [2015. Efficient option pricing by frame duality with the fast Fourier transform. SIAM Journal on Financial Mathematics 6(1), 713–747; 2016. An efficient transform method for Asian option pricing. SIAM Journal on Financial Mathematics 7(1), 845–892], we present a systematic study on effectively computing the Gerber–Shiu function in the Lévy risk model, where the frame duality projection is used for approximation. By introducing an auxiliary function, we provide a smooth extension of the Gerber–Shiu function, which has closed-form Fourier transform and is differentiable over the whole real line under some conditions. The objective function is approximated by its frame duality projection onto a Riesz basis, and the projection coefficients are readily computed by the fast Fourier transform algorithm. Error analysis is made and the effectiveness of our results will be further illustrated in the numerical experiments.  相似文献   
73.
    
In response to Harris and Helfat's commentary on our article, ‘One hat too many: Key executive plurality and shareholder wealth,’ we suggest that their arguments are quite plausible, but we believe further empirical tests are needed. These proposed tests are described in our response. © 1998 John Wiley & Sons, Ltd.  相似文献   
74.
中国农村金融发展的规模、结构与效率   总被引:7,自引:0,他引:7  
姚耀军  鲁涛 《改革》2004,(5):56-63
最近20多年来,中国农村金融显著发展,但与全国整体金融发展程度相比,农村金融还处于被抑制的状态。目前中国金融发展的二元性并没有得到有效的缓解,相反有着进一步加剧的趋势。存贷差等指标表明,中国农村一直为中国经济增长提供着数目可观的金融剩余。农村金融体系未能有效发挥金融资源的配置功能,金融配置效率低下,这主要是因为在现阶段农村金融供给不能适应农村金融需求的复杂性。  相似文献   
75.
开放式创新集价值创造与价值获取于一体,对于促进合作研发与创新成果转化具有积极作用。但是,创新主体间目标分歧、利益冲突等关系治理问题影响创新绩效与商业化成败,已成为制约开放式创新实践的主要障碍。基于“知识搜索→知识整合→商业化”的过程管理视角,考察了开放式创新关系治理问题的表现与产生机理,发现解决关系治理问题的关键是维护价值创造与价值获取间动态均衡,提出了以信任及关系规范为主体的关系治理机制理论框架,并从合作关系的内在规则与外在行为两个方面论证了关系治理机制的作用效果。  相似文献   
76.
Despite a significant amount of attention, the potential of supplier structural embeddedness (i.e., the value of the structural position in an extended network) to improve the performance of a buying firm remains poorly understood. This study drew on the social network theory to empirically examine a conceptual framework specifying a relationship between the efforts of a buying firm to understand supplier structural configuration and operational and financial performance. This study also examines how the comprehension of structural embeddedness is transformed into performance for a buying firm through relational embeddedness (i.e., the strength of a dyadic relationship). Survey data collected from companies in the U.S. were analyzed using hierarchical regression analysis. The results indicate that the understanding of the structural dimension does help to enhance operational performance of a buying firm, but it does not lead to better financial performance. Empirical evidence shows that a buying firm does improve the quality of a dyadic relationship between the buying firm and a supplier by understanding how the supplier is connected to other firms and what positional values are produced. Further, relational embeddedness is found to mediate the influence of the enhanced understanding of the structural configuration on operational performance.  相似文献   
77.
We present a dynamic model of factor demands based on expected discounted costs minimization. While making only very mild assumptions on expectations and technology, we are able to establish a duality relationship between contemporary factor demands and the technology, and we provide formula for easily recovering marginal products, returns to scale, and technological change from estimated factor demands. Parametrization and implementation are illustrated in a detailed example.  相似文献   
78.
Buyers invest considerably in developing their suppliers, yet the performance effects of such investments are not universal. Drawing on social capital theory, this research investigates whether the relationship between supplier development and relationship benefits may be facilitated by the generation of relational capital. The authors examine mediating and moderating roles of relational capital in the relationship between two aspects of supplier development (capability development, supplier governance) and two dimensions of relationship benefits (supplier benefits, buyer benefits), using survey data collected from 185 suppliers of a large manufacturing firm. Investment in supplier development does not automatically result in benefits for the supplier or reciprocated benefits for the buyer. Rather, relational capital “bridges” supplier development and relationship benefits. Without relational capital, benefits from capability development do not accrue, and the impact of a supplier governance regime can be even detrimental. In conditions of high relational capital, capability development results in lower perceived buyer benefits. The results can help managers ensure that the benefits from their supplier development efforts fully materialize.  相似文献   
79.
In this article, we advocate more extensive use of the benefit function in specifying price-dependent or inverse demand models. We demonstrate how duality theory may be used to establish the interrelationships between the Marshallian (or Hicksian) inverse demands and Luenberger's adjusted price functions, allowing estimable inverse demands to be derived directly from a benefit function. We estimate two systems of inverse demands for Japanese quarterly fish consumption. Results indicate that the procedures and methods employed here appear promising, and may prove beneficial for quantity and welfare analysis when modeling systems of inverse demand functions.  相似文献   
80.
基于对立统一的观念,文章分析了使用价值与价值的两重性对称结构。发现传统理论仅仅把双方的对称限定于商品,在商品之外广泛存在着的使用价值竟然是缺乏对立面的,难道使用价值真能够独立不依吗?在分析了几种可能性之后,笔者认为,存在着与使用价值全面对称的\"广义的价值\"范畴,该广义价值在本质上具有与商品价值相类似的性质。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号