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   1669篇
  免费   59篇
财政金融   275篇
工业经济   210篇
计划管理   386篇
经济学   350篇
综合类   29篇
运输经济   22篇
旅游经济   37篇
贸易经济   258篇
农业经济   34篇
经济概况   117篇
邮电经济   10篇
  2021年   11篇
  2020年   16篇
  2019年   13篇
  2018年   40篇
  2017年   30篇
  2016年   35篇
  2015年   22篇
  2014年   40篇
  2013年   220篇
  2012年   48篇
  2011年   60篇
  2010年   48篇
  2009年   47篇
  2008年   52篇
  2007年   49篇
  2006年   39篇
  2005年   44篇
  2004年   35篇
  2003年   45篇
  2002年   58篇
  2001年   44篇
  2000年   39篇
  1999年   27篇
  1998年   37篇
  1997年   34篇
  1996年   41篇
  1995年   27篇
  1994年   38篇
  1993年   24篇
  1992年   19篇
  1991年   13篇
  1990年   19篇
  1989年   17篇
  1988年   16篇
  1987年   19篇
  1986年   22篇
  1985年   26篇
  1984年   35篇
  1983年   27篇
  1982年   27篇
  1981年   32篇
  1980年   22篇
  1979年   29篇
  1978年   32篇
  1977年   28篇
  1976年   11篇
  1975年   14篇
  1974年   17篇
  1973年   7篇
  1972年   5篇
排序方式: 共有1728条查询结果,搜索用时 15 毫秒
91.
92.
This paper analyzes agreements between governments that determine the division of policy-making power between central and regional governments. Our analysis demonstrates that initial circumstances and political risks affect the degree of centralization that will be adopted, and that asymmetric forms of federalism are often consequences of ongoing negotiations between regional and central governments over the assignment of policy-making authority. We analyze three settings where gains from constitutional exchange may exist: (i) the under-centralized state, (ii) the over-centralized state, and (iii) the constitutional convention. In each case, an asymmetric form of federalism is the predicted outcome, although the degree of asymmetry differs according to starting point. Modern and historical examples are used to illustrate the relevance of our analysis.  相似文献   
93.
94.
Given industry competitiveness, how do firms' new product development (NPD) process designs differ when responding to an innovation mandate? How do NPD design elements differ across firms when implementing NPD processes? These design elements are strategic business unit (SBU) senior management involvement, business case content, customer interactions, and cross‐functional integration. What are the consequences of different combinations of NPD process design elements for innovation productivity? We explore these questions via a collective case study of newly implemented NPD process designs at three different SBUs of a major US‐based international conglomerate, 1 year after receiving the mandate to grow through innovation. Our analysis suggests that industry competitiveness and firm characteristics influence the NPD process design as SBUs employ distinct combinations of NPD design elements. The differential emphasis on design elements leads to variation in process design and divergence in innovation productivity.  相似文献   
95.
This paper determines the effect of estimation risk on optimal portfolio choice under uncertainty. In most realistic problems, the parameters of return distributions are unknown and are estimated using available economic data. Traditional analysis neglects estimation risk by treating the estimated parameters as if they were the true parameters to determine the optimal choice under uncertainty. We show that for normally distributed returns and ‘non-informative’ or ‘invariant’ priors, the admissible set of portfolios taking the estimation uncertainty into account is identical to that given by traditional analysis. However, as a result of estimation risk, the optimal portfolio choice differs from that obtained by traditional analysis. For other plausible priors, the admissible set, and consequently the optimal choice, is shown to differ from that in traditional analysis.  相似文献   
96.
We examine the interface between for-profit and publicly funded research in pharmaceuticals. Firms access upstream basic research through investments in absorptive capacity in the form of in-house basic research and 'pro-publication' internal incentives. Some firms also maintain extensive connections to the wider scientific community, which we measure using data on coauthorship of scientific papers between pharmaceutical company scientists and publicly funded researchers. 'Connectedness' is significantly correlated with firms' internal organization, as well as their performance in drug discovery. The estimated impact of 'connectedness' on private research productivity implies a substantial return to public investments in basic research.  相似文献   
97.
This paper considers the impact of full Islamic shari’ya compliance on developing stock exchanges in their effective provision of development capital. Evidence from a unique study focussing on the Sudan telecommunications company and its listings on the Khartoum as well as Arabian Gulf stock exchanges reveals that costs of capital are considerably higher in the former than latter markets. While there are firm governance benefits arising from Islamic finance monitoring costs are substantial and the banking system is better placed to administer financing arrangements. Larger firms are better placed to circumvent this segmentation through cross-listing on regional exchanges.  相似文献   
98.
It is critically important to understand the relationship between new product launch strategies and their interaction with the competitive environment, which results in the successful introduction of new products. Deciding when to launch new products is among the most significant issues facing managers when formulating new products strategy, especially for products with short product life cycles. However, little extant research has focused on the interaction of product launch timing and the competitive market environment. This study explores the effects of four types of competitive threats on the market performance of short product life‐cycle products. Threats from new products and incumbents are possible. Also, products in the same category and those in related product categories exert competitive pressures. In this paper, a framework of competitive threats is developed, and research questions are constructed and empirically tested using the motion pictures industry as the focus of this research. A set of simultaneous equations was estimated using a sample of 2,948 movies introduced in the U.S. market between 1997 and 2004. The results show that all competition types have negative direct, indirect (as mediated by distribution intensity), and total effects on the performance of a new product. For a focal product, incumbent products exert a greater negative impact on performance than new entrants. Surprisingly, products in different, but related, categories are more harmful to the performance of products than products in the same category. The results have important implications for launch timing and new product performance.  相似文献   
99.
Publicly-traded companies that are controlled by other publicly-traded companies provide a unique setting in which to test whether the market values of majority and minority ownership interests are proportionate to their ownership percentages. Test results indicate that the value of subsidiary net assets and net income are greater to majority shareholders than to minority shareholders. However, comparison of asset and income valuation with a sample of diffusely-held firms indicates that this valuation asymmetry is not due to a wealth transfer from the minority to the majority owners but to a discounting of the portion of the subsidiary owned by the minority shareholders.  相似文献   
100.
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