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   1234篇
  免费   56篇
  国内免费   1篇
财政金融   222篇
工业经济   86篇
计划管理   238篇
经济学   354篇
综合类   12篇
运输经济   14篇
旅游经济   18篇
贸易经济   236篇
农业经济   27篇
经济概况   77篇
邮电经济   7篇
  2024年   2篇
  2023年   19篇
  2022年   8篇
  2021年   37篇
  2020年   52篇
  2019年   68篇
  2018年   68篇
  2017年   65篇
  2016年   55篇
  2015年   31篇
  2014年   71篇
  2013年   148篇
  2012年   84篇
  2011年   65篇
  2010年   65篇
  2009年   65篇
  2008年   63篇
  2007年   34篇
  2006年   28篇
  2005年   18篇
  2004年   21篇
  2003年   41篇
  2002年   20篇
  2001年   23篇
  2000年   12篇
  1999年   15篇
  1998年   14篇
  1997年   9篇
  1996年   12篇
  1995年   10篇
  1994年   6篇
  1993年   7篇
  1992年   6篇
  1991年   5篇
  1990年   5篇
  1989年   5篇
  1988年   5篇
  1987年   1篇
  1986年   1篇
  1985年   6篇
  1984年   4篇
  1983年   2篇
  1982年   2篇
  1981年   3篇
  1979年   6篇
  1978年   2篇
  1977年   1篇
  1964年   1篇
排序方式: 共有1291条查询结果,搜索用时 15 毫秒
991.
This article extends the literature on ethical investment risks, correlations, and comovements. Through a sample of 17 Islamic, socially responsible investment (SRI), and conventional stock indices, we investigate cointegration and dynamic correlations for the period 2005–2015. We also examine these stock indices’ responses to two major economic factors, namely, oil prices and market volatility. Our results show cointegration between Islamic, SRI and conventional stock indices, and comovements with mutual causalities. During crises, dynamic correlations tend to spike; however, quite a different pattern emerges during postcrisis periods when there is more variability in conditional covariances. Finally, we provide evidence that all three types of stock indices react positively to oil price changes, but negatively to global equity market volatility, albeit with different magnitudes. Overall, investors can obtain portfolio diversification benefits through SRI and Islamic stock indices, particularly in postcrisis periods.  相似文献   
992.
This paper elaborates on the general properties of medical innovation processes. It begins with a critical review of different perspectives and methods of investigation used in various streams of research that have previously analysed technical change in the health sector. After profiling and discussing their characteristics, the paper proposes an evolutionary approach to change in medicine constructed around the notion of a ‘Health Innovation System’. Health innovation, it is argued, consists of complex bundles of new medical technologies and clinical services emerging from a highly distributed competence base. Health Innovation Systems are driven by the combination of (1) institutionally-bound interactions among agents (‘gateways’ of innovation) and (2) history-dependent trajectories of change (‘pathways’ of innovation) whose developments emerge from and feed back into the structure of the system through organised transfers of knowledge between research and clinical practice. After drawing examples from recent empirical work on clinical research in specific disease areas, the paper concludes by identifying implications for further research.
Andrea Mina (Corresponding author)Email:
  相似文献   
993.
The present paper investigates the sectoral variety and common patterns across different typologies of knowledge-intensive business services (KIBS). We examine this issue by considering the case of Lombardy, a highly developed manufacturing area the industrial activities of which are experiencing a pervasive transformation towards higher knowledge content, demanding stronger and more pervasive support by advanced services. Drawing on an original survey-based firm-level dataset, we analyze innovation patterns across KIBS, evaluating the explanatory power of traditional classifications of the service sector, as well as the heterogeneity driven by firm and market specific characteristics. Our findings highlight four profiles of KIBS: interactive innovation mode, product innovation mode, conservative innovation mode and techno-organizational innovation mode. When examining in more depth the variables that are associated with cluster membership, we find that firm strategy is the most significant determinant, with size, customer location, and training also playing a role in defining cluster specificities.
Nicoletta CorrocherEmail:
  相似文献   
994.
The Italian industry of fashion goods is a business worth 67.6€ billion in 2006 (Il Sole 24ore, January 10, 2007), of which about 26€ billion is due to the luxury segment. Marketing gurus state that “consumers everywhere at every income level want more luxury” [Danziger, P.N., 2005. Let them Eat the Cake: Marketing Luxury to the Masses as well as the Classes. Dearborn Trade Publishing, Chicago]: therefore, companies should move brands towards a higher positioning and add more valuable features to products and services, but this cannot be obtained only by means of marketing efforts. Which is the role of operations and supply chain management in luxury fashion companies’ success? This paper presents the results of the exploratory stage of a research project ongoing at Politecnico di Milano and dealing with supply chain management in the luxury fashion industry. In total, 12 Italian luxury fashion retailers have been studied in order to describe the main features of operations and supply chain strategies in the luxury fashion segment and to identify their role with respect to the relevant critical success factors.  相似文献   
995.
Privatization through global equity market placement has largely contributed to financial market development and integration. Despite the relevance of the fact, the reasons underlying governments' choice to sell shares of privatized companies abroad are still poorly understood. This paper presents new evidence for a sample of 233 share issue privatizations in 20 OECD countries, showing that redistribution concerns and the objective of domestic financial market development make domestic privatization more likely. However, if budget constraints are binding, governments tend to sell abroad a larger quantity of shares, particularly when corporate governance at home is weak.  相似文献   
996.
We examine the effect of introducing credit default swaps (CDSs) on firm value. Our model allows for dynamic investment and financing, and bondholders can trade in the CDS market. The model incorporates both negative and positive effects of CDSs. CDS markets lead to more liquidations, but they also reduce the probability of costly debt renegotiation and reduce costly equity financing. After calibrating the model, we find that firm value increases by 2.9% on average with the introduction of a CDS market. Firms also invest more and increase leverage. The effect on firm value is strongest for small, financially constrained, and low productivity firms.  相似文献   
997.
Over the last 30 years, regulated sectors have undergone deep reforms in their institutional configuration, tools and goals. This paper reviews the impact of this evolution on energy firms’ investments. First, we survey the existing evidence on the effects of the presence of independent regulatory agencies on utilities’ investment rates in Europe in the MENA countries, and in Latin America, focussing on the role of de facto independence and the institutional framework. Second, we discuss the impact of incentive- versus rate-of-return regulation on firms’ incentives to invest and the interaction with firm private/public ownership. In this regard, we provide new econometric evidence of the recent developments of regulation, using a sample of European energy utilities tracked from 1997 to 2013. Our results confirm previous findings that investment is higher under incentive regulation than under rate of return regulation. However, differently from the earlier results, we find that investments seem to be driven more by the weighted average cost of capital than by the X-factor. The paper concludes reviewing recent evidence on service quality regulation on firm investment specifically on the impact of reward/penalty schemes on capital and operational expenditures.  相似文献   
998.
Conservation Agriculture (CA) has been widely promoted in sub-Saharan Africa (SSA) as a sustainable agricultural practice, yet with debatable success. Most authors assume successful adoption, only if all three principles of CA are implemented: (1) minimum or zero tillage, (2) maintenance of a permanent soil cover, and (3) integration of crop rotations. Based on this strict definition, adoption has declined or remained stagnant. Presently, not much attention has been given to context-suited adaptation possibilities, and partial adoption has not been recognized as an entry point to full adoption. Furthermore, isolated success cases have not been analysed sufficiently. By applying the QAToCA approach based on focus group discussions complemented by semi-structured qualitative expert and farmer interviews, we assessed the reasons behind positive CA adaptation and adoption trends in Zambia. Main reasons behind Zambia’s emerging success are (1) a positive institutional influence, (2) a systematic approach towards CA promotion – encouraging a stepwise adaptation and adoption, and (3) mobilization of strong marketing dynamics around CA. These findings could help to eventually adjust or redesign CA promotion activities. We argue for a careful shift from the ‘dogmatic view’ on adoption of CA as a packaged technology, towards adapting its principles to the small-scale farming context of SSA.  相似文献   
999.
We present a scheme by which a probabilistic forecasting system whose predictions have a poor probabilistic calibration may be recalibrated through the incorporation of past performance information in order to produce a new forecasting system that is demonstrably superior to the original, inasmuch as one may use it to win wagers consistently against someone who is using the original system. The scheme utilizes Gaussian process (GP) modeling to estimate a probability distribution over the probability integral transform (PIT) of a scalar predictand. The GP density estimate gives closed-form access to information entropy measures that are associated with the estimated distribution, which allows the prediction of winnings in wagers against the base forecasting system. A separate consequence of the procedure is that the recalibrated forecast has a uniform expected PIT distribution. One distinguishing feature of the procedure is that it is appropriate even if the PIT values are not i.i.d. The recalibration scheme is formulated in a framework that exploits the deep connections among information theory, forecasting, and betting. We demonstrate the effectiveness of the scheme in two case studies: a laboratory experiment with a nonlinear circuit and seasonal forecasts of the intensity of the El Niño-Southern Oscillation phenomenon.  相似文献   
1000.
Social Economy encompasses a wide array of private organizations that can be situated along a continuum that ranges from civil society to the business sector, e.g., associations, foundations, cooperatives, social enterprises, social business initiatives. The social sphere populated by SE/TS organizations operates in complex and multi‐layer environments and is particularly sensitive to institutional configuration. This paper deals with the institutional policy and attitude of the EU Commission towards SE/TS organizations in the field of welfare policy. We start with an illustration of the key features of the Social Investment policy framework, that stresses the adoption of an ‘active policy’ orientation and the overriding of more traditional ‘compensatory policies’. Secondly, we analyze the regulatory eco‐system of the EU towards Social Economy in the last three decades. Thirdly, we present the main results of an European research project aimed at analyzing the ‘level of recognition’ and ‘institutionalization’ of the SE sector in ten European Countries. Then, we provide some data about the consistency of the Social Economy in EU, based on several research reports promoted  by European Institutions (EESC). Finally, the main results of the analysis are summarized in order to assess the current conjuncture of the Social Economy sector in Europe.  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