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   882篇
  免费   18篇
财政金融   78篇
工业经济   100篇
计划管理   116篇
经济学   265篇
综合类   1篇
运输经济   1篇
旅游经济   10篇
贸易经济   180篇
农业经济   22篇
经济概况   124篇
邮电经济   3篇
  2018年   6篇
  2017年   4篇
  2016年   9篇
  2015年   7篇
  2014年   8篇
  2013年   167篇
  2012年   21篇
  2011年   48篇
  2010年   32篇
  2009年   5篇
  2008年   10篇
  2007年   10篇
  2006年   17篇
  2005年   21篇
  2004年   18篇
  2003年   9篇
  2002年   7篇
  2001年   8篇
  1999年   13篇
  1997年   11篇
  1996年   21篇
  1995年   7篇
  1994年   4篇
  1993年   41篇
  1992年   27篇
  1991年   25篇
  1990年   17篇
  1989年   14篇
  1988年   14篇
  1987年   24篇
  1986年   20篇
  1985年   17篇
  1984年   33篇
  1983年   9篇
  1982年   17篇
  1981年   12篇
  1980年   11篇
  1979年   9篇
  1978年   4篇
  1977年   7篇
  1976年   36篇
  1975年   11篇
  1974年   5篇
  1971年   12篇
  1970年   16篇
  1964年   4篇
  1962年   6篇
  1961年   3篇
  1941年   3篇
  1872年   5篇
排序方式: 共有900条查询结果,搜索用时 15 毫秒
891.
Despite major changes in the number and range of sources of finance for new and small ventures in the United Kingdom in recent years, there continues to be a shortage of risk capital for ventures actively seeking external equity finance. In the United States the informal venture capital market plays a major role in filling this equity gap, particularly in the early stages of venture development.However, there is little comparable information on the size of the informal venture capital pool in the United Kingdom or other European economies, despite recent recognition that the apparent underdevelopment of this market in the U.K. represents a major barrier to the development and growth of new ventures. This paper, therefore, presents the first analysis of the informal venture capital market in the U.K. and compares the characteristics and attitudes of U.K. informal investors with those in the U.S.The data reported in this paper have been obtained from a combination of postal survey and snowball sample techniques that generated useable information from 86 informal investors. Informal investors are playing an important role in venture financing in the U.K. in three ways: they make small scale investments in new and early stage ventures, where the equity gap is most significant; they are more permissive in their financing decisions than the formal venture capital industry in terms of having lower rejection rates, longer exit horizons, and lower target rates of return; and they invest locally and can thereby close the regional equity gap arising from the overconcentration of venture capital investment in the core South-East region in the U.K.In terms of demographics, U.K. informal investors share many of the characteristics of North American informal investors: they are predominantly male, with an entrepreneurial background, financially well-off without being super-rich, and identify investment opportunities from friends and business associates. There are a number of key differences, that may be attributable to differences in contextual factors such as personal tax regimes, regulatory environments, wealth distribution, and the structure of the formal venture capital and IPO markets. For example, U.K. informal investors are significantly older than those in the U.S. reflecting the influence of higher U.K. tax rates on the rate of capital and wealth accumulation.More generally, in comparison to U.S. investors, U.K. informal investors: have more investment opportunities brought to their attention; seriously consider more proposals but invest in no more opportunities; operate independently with syndication and joint investment relatively uncommon, reducing the average total investment per financing round available to ventures; fail to identify entrepreneurs themselves as a primary source of information on investment opportunities; have higher rate of return and capital gains expectations; are slightly less patient investors; and are rather less satisfied with the overall performance of their informal investment portfolios, reflecting intercountry and intertemporal variations in investment climate and conditions. It appears, therefore, that the general inefficiency of the informal capital market identified by Wetzel (1987) (which reflects the invisibility of informal investors, the fragmented nature of the market, and the imperfect channels of communication between investor and entrepreneur) is compounded in the U.K. case. The extent to which this reflects contextual differences on the one hand or simply a slower developmental process in the U.K. will only be common methodological basis. Based on the evidence presented in this paper, however, a key conclusion is that the information networks available to U.K. informal investors are less effective than those in North America, and in particular appear to contain lower quality information and a higher degree of redundant information. Specific forms of intervention in the market by, for example, stimulating the flow of information through the promotion of informal investment networking and brokerage services along the lines of U.S. and Canadian examples such as VCN and COIN therefore appear defensible.  相似文献   
892.
In the debate about the Stability and Growth Pact the focus is mainly on the stability part of the Pact. However, in many European economies, economic growth is a far more important issue. How can economic growth be stimulated by a coordinated European fiscal policy?   相似文献   
893.
894.
Research on entrepreneurship has suggested entrepreneurial phenomena to take place in a wide variety of contexts that deal with new venture emergence. Opportunity discovery and effectuation are seen as the essence of entrepreneurship. The present study examines entrepreneurial behaviour in the organising of an international joint venture (IJV) in Polish transition markets. The paper aims to answer the following question: How is an international joint venture organised in turbulent context through opportunity-discovery and effectuation behaviours? Based on theoretical analysis and a longitudinal case study, we illustrate the organising of an international joint venture in transition markets through specific behaviours of opportunity discovery and effectuation. We show especially the relationship-based nature of all the behaviours. The study advances international entrepreneurship research by emphasising the intertwinedness of the entrepreneurial behaviours with the drastic developments in the transition markets and the evolution of the IJV partnership.  相似文献   
895.
Abstract

This experimental study investigates the effects of cognitive dissonance, expectations, and product performance on product evaluations. The study improves upon the methodological problems of the past experimental studies. The results of a 2×2×2 factorial design suggest that product involvement acts as a moderator in the postdecisional product evaluation process. The theoretical and empirical findings suggest communication guidelines for the advertisers.  相似文献   
896.
897.
898.
899.
本文应用Volterra级数分析非线性振荡器中非线性器件的特性对振荡稳态解的影响。  相似文献   
900.
本文描述的是一种计算图象速度的新奇技术,用一个交又时延线对图象速度的两个相互垂直的分量分别进行计算。如果图象面积是已知的,计算图象速度时就不需要图象面积的其它知识,两个交叉时延线是需要的。该方法作为模拟超大规模集成电路的一种工具是非常适合的。  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