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   5585篇
  免费   122篇
  国内免费   1篇
财政金融   938篇
工业经济   402篇
计划管理   891篇
经济学   1205篇
综合类   75篇
运输经济   31篇
旅游经济   73篇
贸易经济   857篇
农业经济   247篇
经济概况   986篇
邮电经济   3篇
  2020年   72篇
  2019年   120篇
  2018年   129篇
  2017年   145篇
  2016年   132篇
  2015年   76篇
  2014年   136篇
  2013年   539篇
  2012年   160篇
  2011年   212篇
  2010年   166篇
  2009年   165篇
  2008年   152篇
  2007年   143篇
  2006年   124篇
  2005年   98篇
  2004年   98篇
  2003年   107篇
  2002年   96篇
  2001年   131篇
  2000年   112篇
  1999年   92篇
  1998年   110篇
  1997年   78篇
  1996年   81篇
  1995年   95篇
  1994年   64篇
  1993年   98篇
  1992年   78篇
  1991年   87篇
  1990年   75篇
  1989年   79篇
  1988年   70篇
  1987年   76篇
  1986年   78篇
  1985年   86篇
  1984年   97篇
  1983年   67篇
  1982年   74篇
  1981年   75篇
  1980年   76篇
  1979年   76篇
  1978年   51篇
  1977年   62篇
  1976年   42篇
  1975年   55篇
  1974年   38篇
  1973年   43篇
  1972年   37篇
  1971年   32篇
排序方式: 共有5708条查询结果,搜索用时 15 毫秒
81.
82.
In recent years scholars have begun to focus on the consequences of individuals' exposure to civil war, including its severe health and psychological consequences. Our innovation is to move beyond the survey methodology that is widespread in this literature to analyze the actual behavior of individuals with varying degrees of exposure to civil war in a common institutional setting. We exploit the presence of thousands of international soccer (football) players with different exposures to civil conflict in the European professional leagues, and find a strong relationship between the extent of civil conflict in a player's home country and his propensity to behave violently on the soccer field, as measured by yellow and red cards. This link is robust to region fixed effects, country characteristics (e.g. rule of law, per capita income), player characteristics (e.g. age, field position, quality), outliers, and team fixed effects. Reinforcing our claim that we isolate the effect of civil war exposure rather than simple rule breaking or something else entirely, there is no meaningful correlation between our measure of exposure to civil war and soccer performance measures not closely related to violent conduct. The result is also robust to controlling for civil wars before a player's birth, suggesting that it is not driven by factors from the distant historical past.  相似文献   
83.
We developed a model for estimating the fish population for various species in lakes and rivers. Our estimation focuses, in its first step, on fish species that breed outside the lake. Using the annual outside supply of fingerlings, natural survival rate and reported amounts of fish caught, we estimated fish stock. Given the estimated stock for fish bred outside the lake, we can evaluate the catch rate. Assuming equal catch rates for other species, and given the amount caught for each species, we are able to evaluate each species stock. Using the proposed technique, we evaluated various species stocks in the Sea of Galilee (Lake Kinneret) in Israel. Using our suggested technique for evaluating fish stock, we calculated the optimal effort of fishing needed for maximizing steady state profit of the fishers.  相似文献   
84.
The aim of this article is to investigate the determinants of attendance at French football Ligue 1 matches over the period 2008–2011 with an emphasis on examining the effects of both competitive balance and intensity before a match. Competitive balance is measured by the point difference between the two teams concerned by a match in the championship. Competitive intensity is measured by the point difference for the home team in relation to ranks with sporting stakes. Results show that competitive balance has an insignificant impact whereas competitive intensity has a significantly positive impact. Implications are drawn.  相似文献   
85.
Using weekly data, this article conducts a comprehensive analysis and presents new empirical evidences on the short-term stock return reversal and continuance anomaly in the Hong Kong stock market. We confirm that winner stocks behave differently from loser stocks in that the return reversal phenomenon is pervasive within past winner stocks only while past loser stocks tend to show weak return continuance. The arbitrage strategy can earn significantly positive contrarian profits, especially for small firms and illiquid stocks. The anomaly varies across different industries and is also sensitive to the market movement. Despite the existence of the anomaly, our results still in general suggest that the Hong Kong stock market is weak-form efficient because arbitrage trading costs would largely overwhelm the available profits in most cases.  相似文献   
86.
This study compares a range of agricultural commodities over periods of varying economic circumstances. These commodities are examined over three categories, including returns, risk, and contribution to portfolio optimisation. Consistency in these categories is determined over four equal three-year stages which comprise pre-GFC (Global Financial Crisis), GFC, post-GFC and post-post GFC. To demonstrate resilience in the most extreme circumstances, the study uses Conditional Value at Risk (CVaR), which measures extreme risk in the tail of a distribution, as the risk measure and risk-return optimiser. The study thus provides a unique and comprehensive extreme-risk based focus which identifies and ranks the consistency of performance of agricultural commodities over a range of criteria and conditions. Cattle commodities consistently demonstrate the strongest overall performance in the categories examined.  相似文献   
87.
The paper is an attempt to solve - in the style of circumstantial evidence - a few riddles which concern Smith's puzzling ranking of sectors in the fifth chapter of Book II of the Wealth of Nations. In that short (15 pages) chapter ‘Of the different Employments of Capitals’ Smith presents the final element of his theoretical system. The interpretations offered by the modern secondary literature are, as far as I can see, nor correct.

What is Smith's own interpretation? What is his theory behind that ranking? Do his statements really lack consistency? A solution to these riddles can help to clarify Smith's system as a whole and to reconstruct its macroeconomic structure in particular, which is based on a very special but often overlooked conception of sectoral verticality.  相似文献   
88.
We offer empirical information on the correlates of commercialization activity for research projects funded through the US National Institutes of Health's (NIH's) Small Business Innovation Research (SBIR) award program. Based on this analysis we suggest possible recommendations for improving this aspect of the performance of NIH's SBIR program. Specifically, we estimate a model of the probability of commercialization as a function of the project's ability to attract additional developmental funding, along with other control variables. We find that additional developmental funding from non-SBIR federal sources and from own internal sources are important predictors of commercialization success, relatively more so than additional developmental funding from venture capitalists. We also find, among other things, that university involvement in the underlying research increases the probability of commercialization. Thus, these factors should be considered by NIH when making awards, if increased commercialization is an objective.  相似文献   
89.
This paper is a comparison and critique of the old and the new institutional economics, with principal focus on the former. The paper argues that the old institutional economics (OIE) lacks methodological consistency and overall persuasiveness because of the preconceptions it took from the philosophy of pragmatism and its late nineteenth-century attitude towards science. The paper starts from the methodological problem posted by Thorstein Veblen; argues that the OIE was never able to solve that problem; and then poses a resolution of Veblen's dilemma in terms of a ‘benchmark’ programme useful in appraising both the OIE and the NIE. The paper also argues that the most appealing areas of OIE rhetoric–institutions and evolution–do not distinguish that programme from the NIE. What distinguishes the OIE are the less appealing doctrines of holism and instrumental valuing. The paper closes with a brief critique of the neoclassical core of the NIE.  相似文献   
90.
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