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   24383篇
  免费   290篇
财政金融   4029篇
工业经济   1236篇
计划管理   3815篇
经济学   5550篇
综合类   547篇
运输经济   63篇
旅游经济   139篇
贸易经济   5735篇
农业经济   374篇
经济概况   2551篇
信息产业经济   46篇
邮电经济   588篇
  2023年   48篇
  2021年   68篇
  2020年   128篇
  2019年   167篇
  2018年   2578篇
  2017年   2363篇
  2016年   1471篇
  2015年   236篇
  2014年   368篇
  2013年   926篇
  2012年   730篇
  2011年   2281篇
  2010年   2078篇
  2009年   1829篇
  2008年   1782篇
  2007年   2135篇
  2006年   290篇
  2005年   541篇
  2004年   661篇
  2003年   769篇
  2002年   419篇
  2001年   184篇
  2000年   176篇
  1999年   98篇
  1998年   139篇
  1997年   94篇
  1996年   125篇
  1995年   82篇
  1994年   98篇
  1993年   95篇
  1992年   99篇
  1991年   80篇
  1990年   83篇
  1989年   59篇
  1988年   56篇
  1987年   59篇
  1986年   70篇
  1985年   98篇
  1984年   91篇
  1983年   68篇
  1982年   73篇
  1981年   75篇
  1980年   67篇
  1979年   78篇
  1978年   73篇
  1977年   80篇
  1976年   63篇
  1975年   50篇
  1974年   39篇
  1971年   34篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
We examine the importance of Roosevelt’s “relief, recovery, and reform” motives to the distribution of New Deal funds across over 3000 US counties, program by program. The major relief programs most closely followed Roosevelt’s three Rs. Other programs were tilted more in favor of areas with higher incomes. For all programs spending for political advantage in upcoming elections was a significant factor. Roosevelt’s successful reelections were based on developing specific programs for a broad range of constituents, delivering on his stated goals, but also spending more at the margin for political purposes.  相似文献   
63.
In this article the impact of technology education, as a new learning area (subject) in the curriculum, on in-service teacher education in South Africa is described in order to ascertain the extent of the impact. The research on which this article is based draws on a variety of experiences and observations in the field at grassroots level (in particular an outreach project in rural communities). The envisaged impact of technology education on South African schools, communities, teacher educators and teachers, the range of in-service teacher education that is required, and the impacts in urban and rural areas are discussed. Finally a number of concluding remarks are made about the extent of the impact of the inclusion of technology education in the new National Curriculum Statement and whether the situation has changed since the implementation of a pilot technology education project in 1998. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
64.
65.
66.
That survey research is error prone is not a new idea and different varieties of non-sampling error have been investigated in the literature as well as consideration being given in many statistics textbooks to the issue of sampling error. The paper here considers research upon corporate environmental reporting. It compares information provided by corporate environmental reports with information that survey respondents claim their organization’s environmental report contains. This enables the accuracy of the claims to be assessed. Consideration is given to two different industries the Water industry and the Energy industry. Errors due to inaccurate reporting by survey respondents are shown to be relatively infrequent and respondents appear just about as likely to claim they report information that they do not, in fact, report as to fail to indicate that they report information that is, in fact, actually reported.  相似文献   
67.
68.
69.
The current progress of electrification in Russia is clearly insufficient compared with G8 countries. At the same time, economy sectors have a high potential for energy saving. The electricity consumption of households depends on their cash income and the growth rate of electricity tariffs.  相似文献   
70.
This article specifies what an optimal pollution tax should be when dealing with a vertical Cournot oligopoly. Polluting firms sell final goods to consumers and outsource their abatement activities to an environment industry. It is assumed that both markets are imperfectly competitive. Thus, the tax is a single instrument used to regulate three sorts of distortions, one negative externality and two restrictions in production. Consequently, the optimal tax rate is the result of a trade-off that depends on the firms’ market power along the vertical structure. A detailed analysis of Cournot-Nash equilibria in both markets is also performed. In this context, the efficiency of abatement activities plays a key-role. It gives a new understanding to the necessary conditions for the emergence of an eco-industrial sector.   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