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   17758篇
  免费   426篇
  国内免费   13篇
财政金融   3041篇
工业经济   1239篇
计划管理   3058篇
经济学   3988篇
综合类   327篇
运输经济   109篇
旅游经济   285篇
贸易经济   3584篇
农业经济   764篇
经济概况   1703篇
信息产业经济   4篇
邮电经济   95篇
  2021年   197篇
  2020年   174篇
  2019年   261篇
  2018年   497篇
  2017年   526篇
  2016年   514篇
  2015年   281篇
  2014年   402篇
  2013年   1450篇
  2012年   753篇
  2011年   678篇
  2010年   458篇
  2009年   506篇
  2008年   560篇
  2007年   541篇
  2006年   461篇
  2005年   1267篇
  2004年   773篇
  2003年   476篇
  2002年   311篇
  2001年   297篇
  2000年   309篇
  1999年   252篇
  1998年   274篇
  1997年   273篇
  1996年   273篇
  1995年   243篇
  1994年   228篇
  1993年   253篇
  1992年   239篇
  1991年   232篇
  1990年   214篇
  1989年   184篇
  1988年   145篇
  1987年   179篇
  1986年   177篇
  1985年   262篇
  1984年   271篇
  1983年   266篇
  1982年   235篇
  1981年   235篇
  1980年   199篇
  1979年   212篇
  1978年   151篇
  1977年   159篇
  1976年   135篇
  1975年   109篇
  1974年   102篇
  1973年   95篇
  1972年   67篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
The status quo for school science and technology is unacceptable. While the former often is required for admission to university engineering, as well as to science programmes, the latter is deemed most appropriate for less able, concrete thinkers. This situation persists, despite the fact school science tends to generate large groups of citizens who are relatively scientifically and technologically illiterate, largely as a result of its preoccupation with identifying and training potential scientists and engineers. This practice is tyrannical. It must be abandoned forthwith. A realistic alternative is a combined technology and science programme – perhaps called 'technoscience' education – that would treat science and technology as equals. Such courses may, as well, be more democratic in the sense that technological problem solving often is more natural to everyday situations that everyone may find useful, not just future scientists or engineers. A framework for combined technology and science courses is described and defended here. Originally developed through collaborative action research amongst practising teachers of science, the approach appears to be feasible, under certain – perhaps ideal – conditions. A number of changes to science and technology education may be necessary for broader implementation, not the least of which is a general retrenchment in expectations for pre-determined learning, along with adjustments to teacher education. Nevertheless, the approach is recommended because of its emphasis on: personalization, inclusion, problematization, explicitness, apprenticeship, authenticity, contextualization and freedom. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
32.
Australia is unusual among the world's antitrust jurisdictions in not making the pre‐notification of mergers compulsory. However, if the parties are concerned that the Australian Competition and Consumer Commission (ACCC) is likely to object to the merger, there are strong incentives for them to notify the ACCC as the regulator has developed a strong reputation for imposing heavy costs on parties that fail to notify such mergers. The result is a system of quasi‐compulsory notification that creates the strongest incentives for parties to notify the ACCC of those proposals to which it is most likely to object. This study analyses data extracted from the ACCC's merger database and the empirical results are consistent with this characterisation. Mergers reported voluntarily by the parties are found to experience longer delays to completion, and are more likely to be challenged by the ACCC, when compared with a sample of all other mergers assessed by the regulator. The results suggest that non‐compulsory notification allows the parties themselves to pre‐sort the proposed merger vis‐à‐vis its interest to the ACCC.  相似文献   
33.
For reasons of political feasibility, emission trading systems may have to rely on free initial allocation of emission allowances in order to ameliorate adverse production and employment effects in dirty industries. Against the background of an emerging European‐wide emission trading system, we examine the trade‐off between such compensation and economic efficiency under output‐based and emissions‐based allocation rules. We show that the emissions‐based allocation rule is more costly than the output‐based rule in terms of maintaining output and employment in energy‐intensive industries. When the international allowance price increases, the inferiority of emissions‐based allocation vis‐à‐vis output‐based allocation becomes more pronounced, as emission subsidies drastically restrict efficiency gains from international trade in emission allowances.  相似文献   
34.
35.
36.
Transdisciplinarity: Context, contradictions and capacity   总被引:1,自引:0,他引:1  
  相似文献   
37.
Analysis of firm investment behavior during 1982–1993 shows that the Tax Reform Act of 1986 (TRA 86) Public Law No. 99-514 substantially affects both purchases and leases of depreciable assets. The changes in the regular corporate income tax rules are shown to lower asset acquisition. The effect of the alternative minimum tax (AMT) is found to vary with the debt share in firms’ capital structure and with the frequency of AMT exposure during the life of the assets acquired. On average, TRA86 depresses asset purchases less for firms that are subject to the AMT: AMT somewhat mitigates the negative effects of the regular tax rules.  相似文献   
38.
39.
40.
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