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   19091篇
  免费   122篇
  国内免费   1篇
财政金融   2925篇
工业经济   900篇
计划管理   3031篇
经济学   4480篇
综合类   517篇
运输经济   18篇
旅游经济   23篇
贸易经济   4890篇
农业经济   104篇
经济概况   1708篇
信息产业经济   44篇
邮电经济   574篇
  2023年   16篇
  2022年   25篇
  2021年   47篇
  2020年   58篇
  2019年   86篇
  2018年   2381篇
  2017年   2130篇
  2016年   1287篇
  2015年   155篇
  2014年   171篇
  2013年   415篇
  2012年   541篇
  2011年   2024篇
  2010年   1925篇
  2009年   1616篇
  2008年   1611篇
  2007年   1940篇
  2006年   157篇
  2005年   464篇
  2004年   512篇
  2003年   617篇
  2002年   302篇
  2001年   102篇
  2000年   83篇
  1999年   37篇
  1998年   40篇
  1997年   33篇
  1996年   39篇
  1995年   16篇
  1994年   21篇
  1993年   17篇
  1992年   18篇
  1991年   15篇
  1990年   12篇
  1989年   12篇
  1987年   13篇
  1986年   25篇
  1985年   14篇
  1984年   13篇
  1983年   9篇
  1982年   17篇
  1981年   12篇
  1980年   8篇
  1979年   14篇
  1978年   11篇
  1977年   17篇
  1964年   6篇
  1963年   8篇
  1961年   9篇
  1954年   6篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
131.
Despite the fact that international technology transfer has been widely studied its management still encounters many difficulties. To fully understand the issues that are relevant to the process of transferring production technology, it is necessary to determine the important factors that influence this process. Learning curves are often used as a means of determining the time required to become familiar with a transferred technology. The cases discussed in this paper have all employed learning curves, which were established at the outset of the transfer process and which turned out to be incorrect. As a consequence the envisaged efficiencies were not obtained. This phenomenon is partly due to the fact that when technology is transferred to a relatively inexperienced 'destination company', the curve is established based on the circumstances of the 'source company'. The case study findings lead to the conclusion that to establish a realistic curve a more comprehensive method is required than simply basing anticipated performance on that achieved at the source company.  相似文献   
132.
The United States (US) exports more than US$6 billion in agricultural commodities to the European Union(EU) each year, but one issue carries the potential to diminish this trade: use of biotechnology in food production. The EU has adopted more stringent policies towards biotechnology than the US. Understanding differences in European and American policies towards genetically modified (GM) foods requires a greater understanding of consumers’ attitudes and preferences. This paper reports results from the first large‐scale, cross‐Atlantic study to analyse consumer demand for genetically modified food in a non‐hypothetical market environment. We strongly reject the frequent if convenient assumption in trade theory that consumer preferences are identical across countries: the median level of compensation demanded by English and French consumers to consume a GM food is found to be more than twice that in any of the US locations. Results have important implications for trade theory, which typically focuses on differences in specialization, comparative advantage and factor endowments across countries, and for on‐going trade disputes at the World Trade Organization.  相似文献   
133.
134.
135.
136.
We extend Condorcet’s Jury Theorem (Essai sur l’application de l’analyse à la probabilité des décisions rendues à la pluralité des voix. De l’imprimerie royale, 1785) to weighted voting games with voters of two kinds: a fixed (possibly empty) set of ‘major’ voters with fixed weights, and an ever-increasing number of ‘minor’ voters, whose total weight is also fixed, but where each individual’s weight becomes negligible. As our main result, we obtain the limiting probability that the jury will arrive at the correct decision as a function of the competence of the few major players. As in Condorcet’s result the quota q = 1/2 is found to play a prominent role. I wish to thank Maurice Koster, Moshé Machover, Guillermo Owen and two anonymous referees for helpful comments.  相似文献   
137.
Background risk can influence the performance of insurance markets that must deal with adverse selection when applicants are risk vulnerable, since they are more averse to bearing the insurable risk as a result of their exposures to background risk. We show that background risk always results in a lower deductible for the incentive constrained contract, and that a broader range of markets attains the stable sequential equilibrium cross-subsidized pair of separating contracts. We conclude that background risk always improves the performance of markets for coverage against (insurable) foreground risks that must deal with adverse selection. We also find, however, that these improvements are never sufficient to offset the cost to insureds of bearing the background risk.  相似文献   
138.
139.
140.
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