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   259篇
  免费   11篇
  2021年   2篇
  2020年   2篇
  2019年   6篇
  2018年   6篇
  2017年   11篇
  2016年   7篇
  2015年   8篇
  2014年   5篇
  2013年   74篇
  2012年   5篇
  2011年   9篇
  2010年   4篇
  2009年   5篇
  2008年   6篇
  2007年   3篇
  2006年   5篇
  2005年   7篇
  2004年   5篇
  2003年   4篇
  2002年   5篇
  2001年   5篇
  2000年   6篇
  1999年   7篇
  1998年   2篇
  1997年   5篇
  1995年   3篇
  1994年   5篇
  1993年   3篇
  1992年   3篇
  1991年   3篇
  1990年   2篇
  1988年   1篇
  1987年   4篇
  1986年   1篇
  1985年   1篇
  1984年   4篇
  1982年   1篇
  1981年   3篇
  1980年   5篇
  1979年   2篇
  1978年   5篇
  1977年   1篇
  1976年   3篇
  1975年   1篇
  1974年   4篇
  1973年   2篇
  1972年   1篇
  1971年   1篇
  1970年   2篇
  1966年   1篇
排序方式: 共有270条查询结果,搜索用时 78 毫秒
21.
Based on data from 229 industry-federal laboratory projects, our research analyzes combinations of technical roles and laboratory characteristics to determine their relation to projects' effectiveness. The results show increased effectiveness when the combination of technical roles follows a "gradient." That is, performance is enhanced when the company plays a different technical role than the laboratory, but a role that is only a step away on the basic-applied-development spectrum. Effectiveness diminishes when both the company and the federal laboratory play the same technical role or when the technical roles are far apart on the basic-applied-development spectrum. The results may have general implications for public policy partnerships, suggesting that although partnership effectiveness requires distinctive roles, partner roles should not be so different as to undermine possibilities for coordination and integration.  相似文献   
22.
Combining an analysis of the compliance incentives faced by firms in an emissions trading program, a comprehensive review of the enforcement strategies employed in Sulfur Dioxide Allowance and the Regional Clean Air Incentives Market (RECLAIM) programs, and a review of the compliance performance of these programs thus far, we are able to propose several practical guidelines for enforcing emissions trading programs. We stress the importance of prevailing market prices for emissions permits in determining compliance incentives, the importance of accurately measuring firms' emissions, and the importance of implementing enforcement strategies that remove the incentives firms may have to falsify emissions reports.  相似文献   
23.
This paper examines the wider effects of inward foreign directinvestment (FDI) to the UK on improving the practices and competitivenessof domestic industry. Surveyed domestic suppliers, competitors,and customers to foreign investors reported extensive positiveimpacts on their practices, focused particularly on reductionsin X-inefficiencies, and on their competitiveness, althoughin the case of competitors benefits had to be balanced againstadverse effects. Knowledge transfers through personal contactsand the demonstration effect, were important to the transmissionof impacts, but a number of other channels were also important,including additional supplier sales, improved customer inputs,and the competitive spur. Regional policymakers should takethese wider benefits into account in the design of policiesfor attracting and embedding foreign investment. However, whilstthere was no evidence that foreign firms in assisted regionshad fewer benefits than those in core regions, there was a lotof leakage outside of the areas attracting foreign firms, suggestingthat policies to promote spillovers should not be developedentirely in a local or regional framework.  相似文献   
24.
Wessex cowboys?     
Summary. Recent excavations in Wessex, and the full publication of many of them, have produced a rich variety of evidence reflecting on the dramatic economic and social changes which were taking place in the period c.1300–600 BC. The underlying trajectory is increased agro‐pastoral production, the development of secondary products and the acceptance of new consumption practices. The evidence is presented and a series of scenarios are offered to explain the observed changes.  相似文献   
25.
26.
27.
28.
29.
30.
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