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   11181篇
  免费   3994篇
财政金融   907篇
工业经济   1673篇
计划管理   1372篇
经济学   3413篇
综合类   151篇
运输经济   51篇
旅游经济   52篇
贸易经济   3592篇
农业经济   2641篇
经济概况   1262篇
邮电经济   61篇
  2024年   185篇
  2023年   419篇
  2022年   266篇
  2021年   218篇
  2020年   541篇
  2019年   1044篇
  2018年   854篇
  2017年   920篇
  2016年   796篇
  2015年   690篇
  2014年   833篇
  2013年   1095篇
  2012年   1052篇
  2011年   767篇
  2010年   765篇
  2009年   695篇
  2008年   449篇
  2007年   546篇
  2006年   455篇
  2005年   453篇
  2004年   410篇
  2003年   288篇
  2002年   212篇
  2001年   133篇
  2000年   97篇
  1999年   92篇
  1998年   98篇
  1997年   84篇
  1996年   61篇
  1995年   51篇
  1994年   51篇
  1993年   59篇
  1992年   78篇
  1991年   97篇
  1990年   37篇
  1989年   40篇
  1988年   17篇
  1987年   12篇
  1985年   16篇
  1984年   14篇
  1983年   17篇
  1982年   25篇
  1979年   11篇
  1978年   11篇
  1976年   8篇
  1973年   8篇
  1972年   8篇
  1971年   10篇
  1969年   9篇
  1963年   10篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
The literature on organizational learning asserts that external learning is often limited geographically and technologically. We scrutinize to what extent organizations acquire external knowledge by accessing external knowledge repositories. We argue that professional service firms (PSFs) grant access to nonlocalized knowledge repositories and thereby not only facilitate external learning but also help to overcome localization. Focusing on patent law firms, we test our predictions using a unique dataset of 544,820 pairs of European patent applications. Analyzing patterns of knowledge flows captured in patent citations, we find that accessing a PSF's repository facilitates the acquisition of external knowledge. As the effect is more pronounced for knowledge that is distant to a focal organization, we conclude that having access to a knowledge repository compensates for localization disadvantages. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
62.
讨论了读取GPS-OEM板定位数据的方法,以Itrax02为例讨论了GPS-OEM板的组成和特点,分析了NMEA-0183语句的数据格式及信息组成,并结合硬件特点研究了C8051Fxxx单片机实现GPS定位信息提取问题,并给出了单片机提取GPS定位信息有关的程序源代码.  相似文献   
63.
This paper represents an equilibrium model for the demand and supply of liquidity and its impact on asset prices and welfare. We show that, when constant market presence is costly, purely idiosyncratic shocks lead to endogenous demand of liquidity and large price deviations from fundamentals. Moreover, market forces fail to lead to efficient supply of liquidity, which calls for potential policy interventions. However, we demonstrate that different policy tools can yield different efficiency consequences. For example, lowering the cost of supplying liquidity on the spot (e.g., through direct injection of liquidity or relaxation of ex post margin constraints) can decrease welfare while forcing more liquidity supply (e.g., through coordination of market participants) can improve welfare.  相似文献   
64.
Policymakers often question whether not-for-profit (NFP) hospitals provide enough charity care to justify tax advantages. In 1993, Texas enacted legislation requiring NFP hospitals to provide certain community benefits at levels set forth in specific criteria to retain tax-exempt status; this paper focuses on the effect of the legislation’s requirement that NFP hospitals spend a minimum of 4% of net patient revenue on charity care. We also study a modification of the law passed in 1995, which allows the deduction of bad debts expense when calculating net patient revenue. This change effectively lowers required charity care spending, and our study considers whether Texas hospitals responded by reducing charity care spending.  相似文献   
65.
This article investigates the natural hedging strategy to deal with longevity risks for life insurance companies. We propose an immunization model that incorporates a stochastic mortality dynamic to calculate the optimal life insurance–annuity product mix ratio to hedge against longevity risks. We model the dynamic of the changes in future mortality using the well‐known Lee–Carter model and discuss the model risk issue by comparing the results between the Lee–Carter and Cairns–Blake–Dowd models. On the basis of the mortality experience and insurance products in the United States, we demonstrate that the proposed model can lead to an optimal product mix and effectively reduce longevity risks for life insurance companies.  相似文献   
66.
This paper examines the effect of debt and liquidity on corporate investment in a continuous-time framework. We show that stockholder–bondholder agency conflicts cause investment thresholds to be U-shaped in leverage and decreasing in liquidity. In the absence of tax effects, we derive the optimal level of liquid funds that eliminates agency costs by implementing the first-best investment policy for a given capital structure. In a second step we generalize the framework by introducing a tax advantage of debt, and we show that an interior solution for liquidity and capital structure optimally trades off tax benefits and agency costs of debt.  相似文献   
67.
服务“三农”是农业银行的特色项目。农业银行目前已有一系列的产品品牌。文章分析了服务“三农”产品品牌的特色,探讨了服务“三农品牌”创新与营销推广的路途。  相似文献   
68.
Jennifer M. Gidley 《Futures》2010,42(2):125-133
This paper points to some limitations of the narrow version of integral futures (IF) as represented in the recent special issue of Futures (2008, vol. 40, issue 2). I also propose several ways that the IF brand could be refreshed through a broader and deeper approach to integral futures by way of a scholarly engagement with other kindred discourses. The main focus of this paper is to open out beyond the “myth-of-the-given” in relation to the notion of integral and in this way broaden and deepen possibilities for integral futures.  相似文献   
69.
Jennifer M. Gidley 《Futures》2010,42(6):625-632
This essay is a postformal rejoinder to Ziauddin Sardar's Welcome to Postnormal Times. I have no quarrel with Sardar's conclusion that these times are postnormal, nor do I disagree with many of his observations, but our standpoints regarding implications are somewhat contradictory. Paradoxically, rather than jump into an old paradigm form of debate with Sardar's interpretations of postnormalcy, this rejoinder is a playful postformal response. I celebrate our complementary views as expressions of the complex truths of multiperspectivality. First I question the meaning of normal and postnormal in the context of such notions as “the pathology of normalcy.” Secondly I begin to explore the postnormal circumstances from a postformal perspective. This involves discussion of notions of progress, development, evolution and co-evolution from different points of view as an opener to coming to terms with complexity. I then explore how concepts such as complexity and paradox can be understood as paths to wisdom; how active imagination can be engaged in the service of life; and how engaged imagination can unfold new normative narratives of alternative futures. Such imaginaries of hope are vital for the wellbeing of young people. The essay closes with a call to embrace the richness of complexity and play with—rather than fear—the paradox of planetary pluralism.  相似文献   
70.
Portfolio credit risk models as well as models for operational risk can often be treated analogously to the collective risk model coming from insurance. Applying the classical Panjer recursion in the collective risk model can lead to numerical instabilities, for instance if the claim number distribution is extended negative binomial or extended logarithmic. We present a generalization of Panjer’s recursion that leads to numerically stable algorithms. The algorithm can be applied to the collective risk model, where the claim number follows, for example, a Poisson distribution mixed over a generalized tempered stable distribution with exponent in (0,1). De Pril’s recursion can be generalized in the same vein. We also present an analogue of our method for the collective model with a severity distribution having mixed support.  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