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   78篇
  免费   3篇
财政金融   15篇
工业经济   7篇
计划管理   14篇
经济学   9篇
贸易经济   12篇
农业经济   6篇
经济概况   17篇
信息产业经济   1篇
  2023年   1篇
  2022年   1篇
  2021年   1篇
  2019年   3篇
  2018年   2篇
  2017年   2篇
  2016年   3篇
  2015年   2篇
  2014年   3篇
  2013年   9篇
  2012年   6篇
  2011年   13篇
  2010年   3篇
  2009年   2篇
  2008年   1篇
  2007年   3篇
  2006年   5篇
  2004年   3篇
  2003年   1篇
  2002年   3篇
  2001年   2篇
  1998年   1篇
  1996年   2篇
  1994年   1篇
  1993年   1篇
  1992年   1篇
  1991年   1篇
  1989年   2篇
  1987年   1篇
  1973年   2篇
排序方式: 共有81条查询结果,搜索用时 15 毫秒
71.
The worldwide extraordinary level of interest in digital information networks’ deployment among nations is due to the strong perception that they bring economic, social and environmental value. Our literature review on studies aiming at clarifying the value of information networks, led us to conclude that these studies take speculative, elusive or limited conclusions. We identify the requirements to capture the value of information networks and indicate a possible theoretical ground to account for it. Based upon this, we propose a framework operationalized with data from Eurostat. Furthermore, we identify the added-value of our framework with a precise and comprehensive comparison with two state of the art reference frameworks. We demonstrate that our framework provides significant conceptual added-value and, more fundamentally, allows for traditional measures of economic value (e.g. productivity and growth), as well as for other measures of value (e.g. social and environmental). Finally, we demonstrate with examples the wider application range of our framework in comparison with existing work.  相似文献   
72.
The EU regulatory framework enacted 25 May 2011 has the objective to provide functionally equal access to telecommunication services for disabled persons. What are the rules, who are the target groups, and what obstacles do they face when using various telecommunication services? And what arrangements do exist in a selected group of six EU Member States to remove these obstacles? Recommendations include the introduction of a more market-oriented approach, independent of specific networks.  相似文献   
73.
Firms are able to survive only if they adapt appropriately in response to disturbances. The ability of a farm to continue after a disturbance is defined as resilience. To analyse the resilience of EU farms we explore exit and the number of adaptation strategies that farmers follow under two scenarios. The current CAP will be continued in the base scenario, while it will be abolished in scenario 2. The outcomes show that under both scenarios large, more specialised farms with young farm heads are most resilient, and small more diversified farms headed by old farmers are least resilient.  相似文献   
74.
In this article, the gap between futures research (long term) and market research (short term) is closed in two ways. Firstly, by describing methods of market exploration that can be used earlier on in the process of development and diffusion of breakthrough technologies, so market research can be applied along with futures research. Secondly, the gap is closed by actually combining futures research and market research. We start the article from the perspective of the market research discipline and describe the problems in market research that require new approaches. The validity of market research results is often low when breakthrough technologies enter the market. To investigate this problem, assumptions for valid market research results are presented. In some cases, when breakthrough technologies first enter the market, these assumptions do not hold and market research becomes problematic whereas in other cases customers' needs and preferences are not an issue at all and attention focuses on technological issues. Potential solutions to explore the market in the former cases are suggested. Four approaches are distinguished: (1) adapting existing methods; (2) combining consumer research with market structure analysis or futures research; (3) using theoretic models; and (4) probe and learn approaches. These approaches require different subsets of assumptions and are therefore applicable in different situations.  相似文献   
75.
This article describes multi-method triangulation as a means to enhance the internal validity in a qualitative study on language teachers' practical knowledge. Teachers' practical knowledge is viewed as a multi-dimensional concept, requiring multiple instruments for its exploration. In the triangulation procedure, data collected with three instruments were analysed and related to each other. Three steps of analysis, preceded by a pre-analysis step, were used to combine these data. The triangulation procedure culminated in a fairly comprehensive understanding of teachers' practical knowledge with respect to the teaching of reading comprehension to 16- to 18-year-old students. It was concluded that multi-method triangulation is a worthwhile procedure to enhance the internal validity in qualitative studies on a complex topic such as teachers' practical knowledge.  相似文献   
76.
77.
78.
收费站排队长度测量的视频检测方法   总被引:1,自引:0,他引:1  
视频检测技术因具有直观、功能多、非接触检测等优点在智能交通领域的应用越来越广泛。视频检测可以在高速公路或隧道中用于自动检测停车、撞车、逆行、遗撒物、行人、烟火等交通事件,同时采集车流量等交通数据;还可用于在城市路口检测车辆存在信息,为交通信号机提供触发信号,优化信号控制。本文主要介绍如何通过视频检测技术测量收费站的车辆排队长度,以及当排队长度超过阀值时自动报警。  相似文献   
79.
Many Continental European countries recently reformed their bankruptcy legislations to stimulate reorganization and firm survival. We show that the Belgian 1997 bankruptcy code reform, which implemented several international best practice recommendations, significantly reduced aggregate small and micro business bankruptcy rates. However, using distributed lag models to control for the relationship between bankruptcy rates and macroeconomic variables such as real GDP growth, consumer confidence, inflation, etc., we find that the new code’s impact is not the same for all types of companies. Specifically, while the beneficial effect of the reform is largely similar between small firms (i.e. stock corporations) and micro firms (i.e. partnerships), it is only significant in certain industries (manufacturing and trade). Overall, our results indicate that especially the measures taken to limit domino bankruptcy effects are likely to have had a substantial impact. Our findings have several policy implications for the evaluation and modification of the bankruptcy system.
Cynthia Van HulleEmail:
  相似文献   
80.
Special purpose acquisition companies (SPACs) are created to raise capital and then find non-listed operating companies with which to merge. While most of the extant research has focused on SPAC initial public offerings, we study what happens when SPACs announce business combinations. Our analysis of 236 ‘deSPACs’ completed between January 2012 and June 2021 in the United States documents an average short-term announcement return of +7.4% and a 1-year abnormal return of −14.1% (−18.0% over 2 years) for public investors beginning from the merger announcement. Short-term returns decrease with longer times from initial public offering until announcement.  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