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   25195篇
  免费   267篇
  国内免费   58篇
财政金融   3546篇
工业经济   1302篇
计划管理   4440篇
经济学   5517篇
综合类   1350篇
运输经济   69篇
旅游经济   57篇
贸易经济   5466篇
农业经济   560篇
经济概况   2567篇
信息产业经济   51篇
邮电经济   595篇
  2024年   13篇
  2023年   64篇
  2022年   153篇
  2021年   266篇
  2020年   217篇
  2019年   145篇
  2018年   2416篇
  2017年   2272篇
  2016年   1382篇
  2015年   337篇
  2014年   412篇
  2013年   566篇
  2012年   1108篇
  2011年   2970篇
  2010年   2727篇
  2009年   2120篇
  2008年   2103篇
  2007年   2442篇
  2006年   704篇
  2005年   953篇
  2004年   632篇
  2003年   672篇
  2002年   355篇
  2001年   174篇
  2000年   103篇
  1999年   51篇
  1998年   43篇
  1997年   11篇
  1996年   30篇
  1995年   6篇
  1994年   5篇
  1993年   10篇
  1992年   10篇
  1991年   4篇
  1990年   5篇
  1989年   5篇
  1988年   9篇
  1986年   17篇
  1985年   2篇
  1984年   4篇
  1979年   1篇
  1854年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
We prove that, under very weak conditions, optimal financial products on complete markets are co-monotone with the reversed state price density. Optimality is meant in the sense of the maximization of an arbitrary preference model, e.g., expected utility theory or prospect theory. The proof is based on a result from transport theory. We apply the general result to specific situations, in particular the case of a market described by the Capital Asset Pricing Model or the Black–Scholes model, where we derive a generalization of the two-fund-separation theorem and give an extension to APT factor models and structured products with several underlyings. We use our results to derive a new approach to optimization in wealth management, based on a direct optimization of the return distribution of the portfolio. In particular, we show that optimal products can (essentially) be written as monotonic functions of the market return. We provide existence and nonexistence results for optimal products in this framework. Finally we apply our results to the study of bonus certificates, show that they are not optimal, and construct a cheaper product yielding the same return distribution.  相似文献   
952.
Creativity is acknowledged to be important for economic growth and as an everyday life-skill, however several influential reports have suggested that education could do more to harness creative talent. Creative cognition literature suggests the lack of creativity is at least partly the result of ‘fixation’ (difficulty in generating novel ideas due to imagination being ‘structured’ by existing knowledge). This paper focuses on the secondary (students aged 11–16 years) design and technology (D&T) context in the UK. Here we examine whether teacher practice can contribute to fixation by focusing on one specific facet of teacher practice in D&T; the use of product analysis to inform the generation of creative design ideas. Data is drawn from the preliminary phase of a research and intervention project from interviews with D&T teachers (N = 14), students (N = 126) and lesson observations (N = 10) and an analysis of documents and student work. Product analysis is widely used at different points in design projects but, as is shown, in all cases current practice can lead to fixation, as thinking is constrained down specific paths and tasks are at best at procedural rather than comprehension level. The implications of these findings and tentative ways forward for practitioners are discussed.  相似文献   
953.
Der Beitrag stellt Insurance-linked Securities (“ILS”) als Instrument des alternativen Risikotransfers dar und grenzt ILS von anderen Instrumenten des alternativen Risikotransfers ab.  相似文献   
954.
We analyze the forecasting ability of financial variables to predict the state of the Swiss business cycle up to eight quarters ahead. Overall, our results suggest that financial variables convey leading information for the prediction of business cycles, even when applied to a small open economy. However, we clearly find that model specifications need to be extended to include variables accounting for external shocks, such as exchange rates or international commodity prices. It also appears that the forecasting contribution of individual variables changes over time. Specifically, in the last two decades, stock market liquidity has replaced the term spread as the best single predictor.  相似文献   
955.
This paper investigates the problem of asymmetric information in Taiwan’s cancer insurance market. Through the survey data, we find evidence of adverse selection existing in this market. Furthermore, we collect additional information on the individual, and find that the individual’s family cancer history contains additional valuable information. It can not only more accurately predict the probability of contracting cancer, as well as predict the willingness to purchase extended cancer insurance, but it can also help to mitigate the severity of adverse selection in the insurance market.  相似文献   
956.
Xu  Shan  Ma  Panyi 《Journal of Business Ethics》2022,180(2):747-776
Journal of Business Ethics - This study examines whether the chief executive officer’s (CEO’s) poverty experience has an impact on firms’ corporate social responsibility (CSR). We...  相似文献   
957.
Virtual currencies are in vogue mainly due to two factors. First, as a protest against authority-driven monetary policy decisions and second, as alternatives to deficits in some monetary systems arising out of political instability or other causes. Assuming that virtual currencies indeed (partially) replace national currencies as payment vehicles, we attempt, in this article, to integrate the virtual currency supply and demand into the Keynesian money market framework. This article presents a few results for the central banks and outlines problems that may result for monetary policy formulation. Since this is the first such attempt to model a national money market as a combination of nationally-issued currency and globally-issued virtual currency, certain simplistic assumptions have been made. Nevertheless, the model offers directions on the impact of virtual currencies on the monetary system and the national money market. Additionally, the paper integrates the official standpoints of the European Central Bank and the Bank of England on this topic.  相似文献   
958.
In this work, we simulate the effects of the tax autonomy of the Austrian states on the levels of public employment in each state. We show that depending on the strength of the public sector lobby, tax autonomy would require a reduction of employment in the public sector of between 25 and 35% of the current level. We also show that tax autonomy increases welfare levels by 1–1.5%; that is, the positive change in the disposable income of the workers more than offsets the welfare loss resulting from the lower provision of public goods. Finally, we show that the reduction of public employment is superior in terms of welfare to an alternative scenario in which employment levels are held constant but the wage levels in the public sector are adjusted.  相似文献   
959.
The financial crisis led to a number of new systemic risk measures and a renewed concern over the risk of contagion. This paper surveys the systemic risk literature with a focus on the importance of contributions made by those emphasizing a network-based approach, and how that compares with more commonly used approaches. Research on systemic risk has generally found that the risk of contagion through domino effects is minimal, and thus emphasized focusing on the resiliency of the financial system to broad macroeconomic shocks. Theoretical, methodological, and empirical work is critically examined to provide insight on how and why regulators have emphasized deregulation, diversification, size-based regulations, and portfolio-based coherent systemic risk measures. Furthermore, in the context of network analysis, this paper reviews and critically assesses newly created systemic risk measures. Network analysis and agent-based modeling approaches to understanding network formation offer promise in helping understand contagion, and also detecting fragile systems before they collapse. Theory and evidence discussed here implies that regulators and researchers need to gain an improved understanding of how topology, capital requirements, and liquidity interact.  相似文献   
960.
This study measures and ranks the performance of countries and academic institutions based on a 40-year analysis of publications appearing in 14 leading business and management journals. The focus is on the evolution of Asia-Pacific institutions in international business research output during this period. In addition, an examination is performed to identify factors associated with Asia-Pacific institutions that have achieved the highest rankings. This research shows that the Journal of International Business Studies and the Journal of World Business were central in spreading international business research, as well as in supporting research by authors from the Asia-Pacific region. Further, schools such as Harvard, Wharton, and University of South Carolina have maintained the highest ranks in research output throughout the 40-year period, but recent years have witnessed the emergence of the Chinese University of Hong Kong and University of Hong Kong, among others, in those top ranks.  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