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   2067篇
  免费   16篇
财政金融   152篇
工业经济   749篇
计划管理   330篇
经济学   625篇
综合类   4篇
运输经济   5篇
旅游经济   40篇
贸易经济   70篇
农业经济   56篇
经济概况   52篇
  2023年   3篇
  2021年   3篇
  2020年   15篇
  2019年   10篇
  2018年   13篇
  2017年   9篇
  2016年   15篇
  2015年   7篇
  2014年   30篇
  2013年   81篇
  2012年   88篇
  2011年   374篇
  2010年   293篇
  2009年   198篇
  2008年   154篇
  2007年   168篇
  2006年   124篇
  2005年   92篇
  2004年   65篇
  2003年   63篇
  2002年   66篇
  2001年   15篇
  2000年   30篇
  1999年   15篇
  1998年   14篇
  1997年   7篇
  1996年   8篇
  1995年   7篇
  1994年   6篇
  1993年   8篇
  1992年   6篇
  1991年   4篇
  1990年   4篇
  1989年   5篇
  1988年   2篇
  1987年   3篇
  1986年   3篇
  1985年   6篇
  1984年   6篇
  1983年   7篇
  1982年   9篇
  1981年   7篇
  1980年   6篇
  1979年   6篇
  1978年   3篇
  1977年   5篇
  1976年   6篇
  1975年   3篇
  1970年   3篇
  1969年   2篇
排序方式: 共有2083条查询结果,搜索用时 15 毫秒
961.
This paper applies the data envelopment analysis (DEA) approach to measure the productivity performance of China's telecommunications sector at the provincial level. The results indicate that the efficiency scores for different provinces and regions are diverse: the efficiency scores of the provinces in the eastern region are significantly higher than those in the central and western regions. The differences in efficiency scores are mainly due to the differences in the operating environments of different provinces, rather than the efficiency performance of telecommunications enterprises. The results also suggest that labour redundancy and excess capacity of long-distance optical cable lines are major problems in China's telecommunications sector. After a period of rapid growth in investment and number of subscribers, it is time for the telecommunications sector to consolidate and to put more emphasis on productivity growth in order to meet the challenges posed by the World Trade Organization (WTO) commitments.  相似文献   
962.
963.
We examine whether international equity mutual fund managers shift their portfolios toward stocks with higher financial reporting quality (FRQ) during periods of high political uncertainty. Our study is motivated by two primary factors. First, prior research shows evidence of fund managers’ “flight to quality” (e.g., to less risky securities) during periods of uncertainty. Second, recent theoretical research concludes that stocks with higher FRQ are assessed as less sensitive to systematic risk (such as political uncertainty). We employ national elections as exogenous increases in systematic risk in the local markets and accordingly use an international sample of mutual funds that focus on local markets. We find that mutual fund managers shift their equity holdings to stocks with higher FRQ during election periods when political uncertainty is higher. Such a flight‐to‐quality effect is less pronounced for elections with larger expected electoral margins in the pre‐election period (i.e., when the incumbent is more likely to win the election) and for countries with higher transactions costs. In contrast, the effect is more pronounced when governments have greater involvement in the local economy. Our inferences are robust to alternative proxies for political uncertainty and FRQ and to numerous other sensitivity analyses.  相似文献   
964.
It is more and more agreed by research and policy that a long-term sustainability of industrialized societies cannot be achieved without fundamental changes at the level of different societal subsystems, such as the agricultural, transportation or water management systems. This view has lead to an increase in the amount of research carried out about the so-called “transitions”. Transitions comprise long-term, fundamental change in societal subsystems and are seen as encompassing co-evolutionary and mutually reinforcing processes in the economic, technological, institutional and socio-cultural domains. Transition research aims at understanding transitions and at finding methods that facilitate change directed towards societal goals (so-called “transition management”).This paper adds to the growing body of concepts of this young research strand. It suggests a framework for defining and describing “regimes”, the systems resulting from the broad and interdisciplinary view taken by transition research. The concept “regime” is of central importance for transition research, since it defines the level of societal systems on which transitions are mainly analysed. What actually is “the regime” to be researched and possibly managed is however usually not given through clear system boundaries but is a matter of framing and deliberation. In order to guide processes of regime identification, the paper develops five defining characteristics of regimes and gives a definition based on them. Further a method useful to structure and graphically represent knowledge about a regime is introduced. Such a structuring of knowledge is an important first step to understand how a regime “works”.  相似文献   
965.
All payments to physicians under Medicare Part B are adjusted to reflect geographic differences in practice costs. The methods used for this adjustment, and temporary price floors imposed by Congress, have created longstanding systematic under and overpayment across physicians, whereby some are routinely underpaid while others are routinely overpaid. Using a nationally representative 2008 survey of physicians, this study examines whether the relative generosity of Medicare influences beneficiary access to care. We find that in areas where Medicare payments are more generous physicians are more likely to accept new Medicare patients, whereas in less generous areas, they are less likely. Our estimated models suggest that if Medicare could eliminate the systematic biases inherent its payment formula, it would see a net improvement to access to care under Medicare Part B.  相似文献   
966.
One of the most significant differences between developing countries and today’s advanced states is the fact that many developing countries rely heavily on one or several natural resources. That such dependence shapes the state’s ability to tax—its fiscal capacity—is commonly argued in the political science and applied development literatures. This paper approaches the issue from an economic angle. Our analytical foundation builds upon a novel theoretical framework, and allows us to model fiscal capacity as an ex ante investment under uncertainty. For our panel of 30 hydrocarbon-rich economies, instrumental-variables results provide strong empirical support for our theoretical proposition: resource intensification weakens state-building by impeding the state’s fiscal capacity. This result provides an inaugural validation of the economic analytics of state-capacity determinants: understanding these determinants serves to build stronger states and support sustainable paths of development. Our result also suggests that one of the main tools of fiscal policy-analysis in resource-rich economies, namely optimal taxation, could gain in practical relevance by incorporating capacity-constraints into the analytical fiscal-framework.  相似文献   
967.
Although there have been several studies dealing with trade show performance recently, most of these research measured only overall success or sales performance of trade shows and failed to capture other dimensions of trade show performance such as image-buildings, information-gatherings and so on. In this research, we study the differential effects of determinants on each dimension of trade show performance considering the multi-stage nature of trade show management. We suggest and verify a conceptual structure that captures multi-dimensions of trade show performance (i.e., sales-related, image-building, information-gathering, and relationship-improvement) and relate each performance dimension to tactical variables such as quantifying show objectives, pre-show promotion, booth staff training, follow-up and so on. More importantly, we have categorized these variables by three stages of pre-show, at-show, and post-show activities. Thus, we developed a set of models linking tactical variables in each stage with the appropriate performance dimension. Results suggest that the variables we considered in each stage have a significant and differential impact on each dimension of trade show performance. Managerial implications of the findings are considered and limitations along with future directions discussed.  相似文献   
968.
In a deliberate attempt to shift the analytical focus away from critical examination of the underlying ideological assumptions of project management standards, this study focuses on the performativity of a specific project life cycle methodology. Through a case study, the article analyzes the effects and usages of the methodology in practice. This article proposes to think of project methodologies as fluid objects, creating shifting and adaptable relationships between methodology and practice.  相似文献   
969.
In this paper we introduce a new Malmquist productivity index that has three attractive features: it avoids linear programming infeasibilities under variable returns to scale, it allows for technical regress, and it does not need to be recomputed when a new time period is added to the data set. The proposed index is compared to both the adjacent Malmquist index and the global Malmquist index in an empirical example, which highlights the drawbacks of the existing indexes compared to the proposed biennial Malmquist index.Our results show that 13% of the observations in the data set may have to be ignored due to infeasibilities when decomposing the adjacent Malmquist index. Using only this reduced data set does at times lead to quite different results than those generated by applying the proposed biennial Malmquist index to the entire data set. The empirical example also shows that productivity change estimated between two time periods using the global Malmquist index change substantially when a third time period is added to the data set, whereas the proposed biennial Malmquist index is immune to this problem.  相似文献   
970.
This paper analyses firms’ drivers for linking to public research organisations (PRO) (first goal) and compares perceptions and behaviours of linked vs. unlinked firms (second goal). We used an original firm database constructed from a representative survey with information for linked and unlinked firms for year 2005 in Argentina. Drivers were estimated using a Probit model, while differences in perceptions and behaviours between linked and unlinked firms were assessed with propensity score matching techniques. For our first goal we found that (i) firms’ knowledge bases were not drivers for linking to PRO and (ii) networking capabilities matter but there is a substitution effect between interacting with PRO and interacting with other economic agents in the market when firms aim at exchanging information rather than doing joint research. These findings may imply that current linkages are not exploiting properly their knowledge potential; it may be worth designing a division of labour among PRO in their functions in PRO-industry interactions. For our second goal: we found that (i) linked firms invest more in innovative activities; (ii) they are more prone to patenting; (iii) both groups of firms value similarly PRO research outputs available at arm length (i.e. without direct linking). Given the asymmetric development on appropriability tools between PRO and firms and the fact that all firms benefit from PRO research outputs, the higher predisposition of linked firms towards patenting, suggests that special attention should be placed at analysing the risks of a private appropriation of publicly created knowledge.  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