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   16755篇
  免费   484篇
  国内免费   15篇
财政金融   2863篇
工业经济   1152篇
计划管理   2940篇
经济学   3442篇
综合类   313篇
运输经济   104篇
旅游经济   302篇
贸易经济   3539篇
农业经济   775篇
经济概况   1663篇
邮电经济   161篇
  2021年   117篇
  2020年   193篇
  2019年   268篇
  2018年   438篇
  2017年   464篇
  2016年   464篇
  2015年   319篇
  2014年   460篇
  2013年   1642篇
  2012年   564篇
  2011年   534篇
  2010年   527篇
  2009年   504篇
  2008年   581篇
  2007年   515篇
  2006年   448篇
  2005年   448篇
  2004年   347篇
  2003年   360篇
  2002年   345篇
  2001年   330篇
  2000年   316篇
  1999年   272篇
  1998年   279篇
  1997年   286篇
  1996年   287篇
  1995年   260篇
  1994年   241篇
  1993年   277篇
  1992年   257篇
  1991年   238篇
  1990年   233篇
  1989年   200篇
  1988年   158篇
  1987年   196篇
  1986年   194篇
  1985年   288篇
  1984年   293篇
  1983年   282篇
  1982年   254篇
  1981年   253篇
  1980年   214篇
  1979年   219篇
  1978年   168篇
  1977年   172篇
  1976年   155篇
  1975年   128篇
  1974年   119篇
  1973年   109篇
  1972年   82篇
排序方式: 共有10000条查询结果,搜索用时 501 毫秒
31.
32.
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   
33.
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   
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.
Zusammenfassung  Die Bildung von Forschungshypothesen ist zwar immer ein kreativer, sollte aber gleichzeitig kein unsystematischer Prozess sein. Im vorliegenden Artikel liegt der Fokus auf der Methodenunterstützung des Entdeckungszusammenhangs. Die Methode der Grounded Theory bietet einen Bezugsrahmen für qualitative empirische Studien, mit dem Theorien entwickelt werden, die aus dem Textmaterial zu begründen sind. Eine Literaturanalyse verdeutlicht, dass das Potenzial dieser Methode bisher in der Controlling- und Rechnungswesenforschung weitgehend ungenutzt bleibt. Anhand einer Diskussion empirischer Studien, welche auf die Methode zurückgreifen, werden Anwendungsm?glichkeiten der Grounded Theory für diese Disziplinen aufgezeigt.
Summary  Creating research hypotheses is always a creative but not necessarily an unsystematic process. In our study we introduce a method supporting the logic of discovery. The grounded theory approach provides a framework for a systematic development of theories emerging from empirical data. A literature review stresses that the potential of the method so far is unused in accounting research. The grounded theory approach is introduced to support empirical work within this research field. Options for an application of the method in accounting research are shown by the means of a discussion of empirical studies. Furthermore the reader gets hints for reference studies.
  相似文献   
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