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   35586篇
  免费   475篇
  国内免费   16篇
财政金融   5448篇
工业经济   1971篇
计划管理   6150篇
经济学   7687篇
综合类   2082篇
运输经济   176篇
旅游经济   202篇
贸易经济   6682篇
农业经济   1056篇
经济概况   3962篇
信息产业经济   44篇
邮电经济   617篇
  2024年   30篇
  2023年   177篇
  2022年   307篇
  2021年   463篇
  2020年   497篇
  2019年   343篇
  2018年   2600篇
  2017年   2524篇
  2016年   1617篇
  2015年   536篇
  2014年   725篇
  2013年   1310篇
  2012年   1725篇
  2011年   3828篇
  2010年   3522篇
  2009年   2697篇
  2008年   2753篇
  2007年   2996篇
  2006年   1436篇
  2005年   1507篇
  2004年   839篇
  2003年   935篇
  2002年   628篇
  2001年   359篇
  2000年   216篇
  1999年   161篇
  1998年   129篇
  1997年   77篇
  1996年   84篇
  1995年   63篇
  1994年   71篇
  1993年   50篇
  1992年   64篇
  1991年   53篇
  1990年   31篇
  1989年   44篇
  1988年   29篇
  1986年   42篇
  1985年   63篇
  1984年   65篇
  1983年   44篇
  1982年   41篇
  1981年   32篇
  1980年   36篇
  1979年   44篇
  1978年   39篇
  1977年   34篇
  1976年   28篇
  1975年   29篇
  1974年   34篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
911.
This paper puts the case for using a pedagogical framework based on the principles of grammatical design in conjunction with conventional creative problem solving strategies in higher education to foster learning for innovation and creativity. It explores the design and delivery of an inaugural creativity and innovation course that used a combination of individual and group projects to explore the combinatorial use of creative problem solving strategies and grammatical design schemas. Using established creative thinking evaluation techniques and reflective practice journals offers a powerful path for the creative development of innovative ideas. Testing (Torrance, Creativity in the classroom, 1977) found that the figurative based creative thinking scores of an experimental group of non-designer undergraduate students significantly improved according to pre and post course tests. Two dimensional and three dimensional design assessment tasks were completed in conjunction with a series of creative problem solving teamwork sessions. Standard SELTS course evaluation also strongly suggests there is value in the active teaching of creativity strategies for the recognition of valuable problems and the development of innovative solutions.  相似文献   
912.
This paper estimates information stickiness with regard to inflation expectations in the United States and the Eurozone for the 1981/06–2015/12 and 1998/Q4–2015/Q2 periods, respectively, and further investigates whether such information stickiness is state-dependent. Based on a bootstrap sub-sample rolling-window estimation, we find that information stickiness varies over time, which contradicts the strict time dependency implied under sticky-information theory. We provide evidence that information stickiness depends on inflation volatility, which indicates that information stickiness is state-dependent and that it has a time trend. Using a threshold model, we estimate structural changes in the state-dependence and time-trend of information stickiness. The results show that information stickiness has been more dependent on inflation volatility and has had a higher time-trend in both regions following the 2008 financial crisis.  相似文献   
913.
This paper addresses the applicability of the convex duality method for utility maximization, in the presence of random endowment. When the underlying price process is a locally bounded semimartingale, we show that the fundamental duality relation holds true, for a wide class of utility functions and unbounded random endowments. We show this duality by exploiting Rockafellar’s theorem on integral functionals, to a random utility function.  相似文献   
914.
探讨了员工个体的主动性人格特质对其学习能力的影响及其作用机制,以及员工的工作卷入和反馈寻求在这一关系中的中介作用。运用企业236个员工数据进行分析,得出以下结论:企业员工的主动性人格显著促进其学习能力;员工的主动性人格显著强化其工作卷入和反馈寻求;员工对内的工作卷入促进了其学习能力,且在主动性人格和学习能力的关系中起部分中介的作用;员工对外的反馈寻求促进其学习能力,且在主动性人格和学习能力的关系中起部分中介作用。研究结论为组织个人学习能力的提升提供了一个重要的前因变量,并对员工工作卷入与反馈寻求的中介作用机制进行了探讨,丰富了个人学习研究,并提出了相关的实践建议。  相似文献   
915.
Neo-Walrasian conceptualizations and DSGE models are incompatible with the emergence of coordination and discoordination in economic activity. While many conceptualizations stemming from the Austrian tradition are generally consistent with these fundamental problems, their process driven approach is hampered by the use of equilibrium constructs. This paper argues for the adoption of formal models that avoid this problem by addressing the following questions. Why should Austrian macroeconomists model? Where do models fit in with respect to pure and applied theory? How to model without equilibrium? To answer this final question I present a structure that aids in the construction and communication of such models.  相似文献   
916.
Although a growing body of research has shown the positive impact of ethical leadership on workplace deviance, questions remain as to whether its benefits are consistent across all situations. In this investigation, we explore an important boundary condition of ethical leadership by exploring how employees’ moral awareness may lessen the need for ethical leadership. Drawing on substitutes for leadership theory, we suggest that when individuals already possess a heightened level of moral awareness, ethical leadership’s role in reducing deviant actions may be reduced. However, when individuals lack this strong moral disposition, ethical leadership may be instrumental in inspiring them to reduce their deviant actions. To enhance the external validity and generalizability of our findings, the current research used two large field samples of working professionals in both Turkey and the USA. Results suggest that ethical leadership’s positive influence on workplace deviance is dependent upon the individual’s moral awareness—helpful for those employees whose moral awareness is low, but not high. Thus, our investigation helps to build theory around the contingencies of ethical leadership and the specific audience for whom it may be more (or less) influential.  相似文献   
917.
Previous research shows that consumers’ response to price and income changes is heterogeneous. In addition, evidence from national data often does not support the classical assumption of one commodity-one price. This paper introduces a data coherent generalization to the quadratic form of the almost ideal demand system (g-QUAIDS) that incorporates the sources of heterogeneity in the demand function and allows for regional price variation. Aggregation over consumers imposes a linearization to the g-QUAIDS that requires a new set of price indices. The results from an empirical study by using microdata from the Household Income and Expenditure Survey of Iran highlight the impact of aggregation bias in relation to the level of aggregation. An investigation of the predictive power of linear versus nonlinear g-QUAIDS in different aggregation levels provides practical recommendations for consumer demand analysis.  相似文献   
918.
Social capital refers to social networks and the norms of reciprocity, cooperation and trust associated with them. It can be studied at different levels of analysis. As previous literature suggests, social capital has aspects at both the individual and collective levels. However, theory development and empirical research have focused on separate, sometimes diverging levels. In an attempt to address this, this research examines the simultaneous influence of individual and regional social capital on the discovery and exploitation of entrepreneurial opportunities using individual-level data from the Global Entrepreneurship Monitor linked with regional-level data on social capital. The results show that individuals from regions with higher social capital are more likely to discover and to exploit entrepreneurial opportunities. Moreover, individuals having networks with other entrepreneurs are also more likely to identify a business opportunity and to become an entrepreneur. Also, we found that social capital at individual level had a greater effect than social capital at regional level in the two stages of the entrepreneurial process.  相似文献   
919.
The call options theory of corporate security valuation is applied to narrow-banking contingent claims of one bank, while the cap options theory is applied to synergy-banking contingent claims of another bank. This article investigates efficiency gains specified as equities of scope associated with the likelihood of the two banks involved in merger under capital regulation. We find that merger incentives are encouraged when the narrowing banking is conducted by the consolidated bank, whereas discouraged when the synergy banking is conducted. Raising bank capital requirement leads to an increased interest margin of the consolidated bank with the narrow banking valuation; however, to a decreased margin of the consolidated bank with the synergy banking valuation. An increase in the capital regulation reduces the merger incentives in the narrow banking valuation whereas increases the merger disincentive in the synergy banking valuation. These findings are consistent with the organizational theory that predicts a comparative advantage of narrow banking proposals in bank mergers.  相似文献   
920.
The aim of this article is to examine the impact of stock exchange mergers on the degree of informational efficiency. For this purpose, we apply the generalized spectral shape test for the martingale difference hypothesis to the stock returns before and after the 31 domestic and cross-border mergers completed from 1997 to 2011. The test is conducted with moving subsample windows, allowing us to detect the periods of (in)efficiency, and thus to conduct a comparative analysis for pre-merger and post-merger periods. We find that higher levels of efficiency are less frequent than lower levels of efficiency after a stock exchange merger. We also find that the impact on the level of efficiency depends on a range of merger characteristics such as the level of development, size, geographical diversification and industrial diversification of stock exchange.  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