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   2868篇
  免费   15篇
财政金融   624篇
工业经济   247篇
计划管理   485篇
经济学   593篇
综合类   48篇
运输经济   19篇
旅游经济   72篇
贸易经济   464篇
农业经济   80篇
经济概况   251篇
  2023年   15篇
  2021年   33篇
  2020年   52篇
  2019年   83篇
  2018年   75篇
  2017年   79篇
  2016年   65篇
  2015年   43篇
  2014年   61篇
  2013年   259篇
  2012年   100篇
  2011年   97篇
  2010年   92篇
  2009年   93篇
  2008年   91篇
  2007年   76篇
  2006年   91篇
  2005年   89篇
  2004年   65篇
  2003年   80篇
  2002年   72篇
  2001年   54篇
  2000年   45篇
  1999年   55篇
  1998年   45篇
  1997年   45篇
  1996年   55篇
  1995年   32篇
  1994年   31篇
  1993年   36篇
  1992年   41篇
  1991年   32篇
  1990年   32篇
  1989年   30篇
  1988年   39篇
  1987年   25篇
  1986年   31篇
  1985年   60篇
  1984年   44篇
  1983年   44篇
  1982年   47篇
  1981年   31篇
  1980年   43篇
  1979年   36篇
  1978年   28篇
  1977年   30篇
  1976年   22篇
  1975年   26篇
  1974年   20篇
  1973年   14篇
排序方式: 共有2883条查询结果,搜索用时 0 毫秒
981.
982.
Abstract

The literary agent is a recent addition to the publishing industry, yet in a relatively short space of time has become instrumental in the production of literature. This article examines the origins and development of the A.P. Watt literary agency to explore how it became a dominant organisation in the late nineteenth century. It analyses how its founder Alexander Pollock Watt, despite being met with resistance, gained legitimacy to be accepted by authors and publishers. Through an analysis of historical sources this article argues that by using contract law, Watt was able to disrupt existing business practices.  相似文献   
983.
At the beginning of February the Hamburg shipyard, Blohm & Voss, introduced the public to a new technical concept which may mean a revolution in shipbuilding: the “Pioneer”-multi-carrier. This design is composed of prefabricated elements. It is based on the mechanical assembly technique and more than one hundred variations are available. INTERECONOMICS asked two representatives of this shipyard about the economic advantages of this new system and what effects it will have upon the shipbuilding industry.  相似文献   
984.
985.
    
In a futures market with a daily price‐limit rule, trading occurs only at prices within limits determined by the previous day's settlement price. Price limits are set in dollars but can be expressed as return limits. When the daily return limit is triggered, the true equilibrium futures return (and price) is unobservable. In such a market, investors may suffer from information loss if the return “moves the limit.” Assuming normally distributed futures returns with unknown means but known volatilities, we develop a Bayesian forecasting model in the presence of return limits and provide some numerical predictions. Our innovation is the derivation of the predictive density for futures returns in the presence of return limits. © 2005 Wiley Periodicals, Inc. Jrl Fut Mark 25:199–210, 2005  相似文献   
986.
Abstract

Value-expressive advertising appeals are effective when the product is value-expressive, while utilitarian appeals are effective when the product is utilitarian. When the product is value-expressive, audience persuasion is influenced through self-congruity. Conversely, when the product is utilitarian, audience persuasion is influenced through functional congruity. The effectiveness of the value-expressive as opposed to utilitarian appeals is argued also to be a function of such product-related factors as differentiation, life cycle, scarcity, and conspicuousness, and consumer-related factors such as involvement, prior knowledge, and self-monitoring. Future research and managerial implications are discussed.  相似文献   
987.
988.
  总被引:2,自引:0,他引:2  
Normality of crop yield residuals pooled to the state and regional level is examined using a procedure that accounts for trend and heteroscedasticity. Normality tests are conducted using farm-level yield data from over 200,000 producers of six crops in seven U.S. states. The results indicate consistent non-normality of crop yields. The effects of assuming normality on insurance premium rates are examined. Assuming normality is found to generate premiums that can differ substantially from premiums derived using data-based empirical distributions.
Montana Agricultural Experiment Station Journal Series No. 2001-7. The Risk Management Agency, USDA, also provided support for this research. The views expressed herein are the authors' and do not necessarily represent those of Montana State University or the Risk Management Agency.
Les auteurs ont analysé la normalité du rendement résiduel des cultures à l'échelon de l'État et à l'échelon régional au moyen d'une méthode tenant compte des conjectures et de l'hétéroscédasticité. Ils ont utilisé les données sur le rendement fournies par plus de 200 000 cultivateurs produisant six cultures dans sept États américains pour effectuer des tests de normalité. Les résultats révèlent l'anormalité constante des rendements. Les auteurs s'interrogent sur les conséquences d'une normalité hypothétique sur les primes d'assurance. En supposant des rendements normaux, on obtient des primes sensiblement différentes de cedes calculées avec une distribution empirique des données.  相似文献   
989.
In this paper, it is shown that Pressler's indicator rate formula is also the optimal condition for the determination of the optimal harvest age under the generalized Faustmann formula. In addition, a modern treatment of the quantity increment, quality increment, and price increment is presented. Pressler's indicator rate formula is then applied to determine the optimal harvest age in a dynamic world of unanticipated changes.  相似文献   
990.
This paper demonstrates how the density function of the U.S. domestic commodity support payments for corn differs between current price-based approaches to support and a revenue-based alternative. Comparing across program scenarios that provide equal expected levels of support at the national level, the revenue-based scenario exhibits a lower variability around total expected annual payments, and perhaps more importantly, a lower probability of high payments than the current-style support. Furthermore, for the vast majority of corn-producing counties in the United States, the coefficient of variation of total gross revenue per acre is lower under the revenue-based support scenario than under the current-style scenario.  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