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   134216篇
  免费   3887篇
  国内免费   1篇
财政金融   25806篇
工业经济   10948篇
计划管理   21640篇
经济学   29608篇
综合类   1453篇
运输经济   952篇
旅游经济   2540篇
贸易经济   22014篇
农业经济   6162篇
经济概况   16738篇
信息产业经济   7篇
邮电经济   236篇
  2021年   873篇
  2020年   1687篇
  2019年   2490篇
  2018年   2438篇
  2017年   2653篇
  2016年   2810篇
  2015年   2152篇
  2014年   3494篇
  2013年   15595篇
  2012年   4285篇
  2011年   4238篇
  2010年   3808篇
  2009年   4416篇
  2008年   3962篇
  2007年   3276篇
  2006年   3614篇
  2005年   3592篇
  2004年   3127篇
  2003年   2828篇
  2002年   2807篇
  2001年   2511篇
  2000年   2326篇
  1999年   2208篇
  1998年   2037篇
  1997年   2068篇
  1996年   1956篇
  1995年   1940篇
  1994年   1943篇
  1993年   1924篇
  1992年   1929篇
  1991年   1853篇
  1990年   1712篇
  1989年   1578篇
  1988年   1514篇
  1987年   1519篇
  1986年   1603篇
  1985年   2361篇
  1984年   2258篇
  1983年   2056篇
  1982年   1906篇
  1981年   1901篇
  1980年   1859篇
  1979年   1755篇
  1978年   1597篇
  1977年   1581篇
  1976年   1349篇
  1975年   1247篇
  1974年   1161篇
  1973年   1152篇
  1972年   865篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
51.
52.
53.
Many organizations invest periodically in a new corporate visual identity (CVI). This study investigates the main effects of CVI changes in four organizations, taking into account three independent variables: stakeholder type (employees vs. consumers), the specific organization, and communication about the CVI change. The results show that CVI changes had positive effects on CVI appreciation and identity/image. However, the effects were different for employees and consumers and differed between specific organizations. Furthermore, adequate communication about the new CVI appeared to be important for people’s appreciation of the CVI. The implications of these findings are discussed.  相似文献   
54.
In cocoa farming forestland is a production factor. Cocoa planting is easiest and production costs are lowest in tropical forest. Historically, therefore, once forestland has been exhausted in a given geographical area planters tend to diversify into other production systems to avoid the poverty (induced by increasing factor cost) of post-forest cultivation. In modern times however cocoa planters exist in a value chain and post-forest diversification could threaten multinational companies relying on rural planters for their raw material. In 2014 ten of the world’s largest chocolate multinationals combined, with more than $500 million in funding, to introduce a cocoa sustainability scheme called CocoaAction. In principle, CocoaAction and similar sustainability schemes sponsored by western multinational chocolate companies are interventions to empower cocoa planters and planting communities in West African countries. But in practice, as this article will show, these schemes are a response to diminishing returns in cocoa-producing communities and the prospect of diversification, and the resulting projection of a shortage in raw material. There are signs that diversification away from cocoa will be beneficial to cocoa planters and their communities. Cocoa sustainability schemes are therefore designed for the benefit of multinational chocolate companies and at the expense of diversification in West African countries.  相似文献   
55.
56.
We investigate the impact of housing wealth, credit availability and financial distress on college enrolment decisions. We find that housing wealth is negatively related to enrolment in public schools and positively related to enrolment in private schools. This evidence suggests that, on average, students substituted away from private schools towards public institutions during the recent financial crisis.  相似文献   
57.
While innovation has become a pervasive term, many of today’s organizations still find innovation elusive. One reason may be that much of what is being said about innovation contributes to misunderstanding. To truly manifest innovation and reap its benefits, one must recognize that innovation is three different things: innovation is an outcome, innovation is a process, and innovation is a mindset. Innovation as an outcome emphasizes what output is sought, including product innovation, process innovation, marketing innovation, business model innovation, supply chain innovation, and organizational innovation. Innovation as a process attends to the way in which innovation should be organized so that outcomes can come to fruition; this includes an overall innovation process and a new product development process. Innovation as a mindset addresses the internalization of innovation by individual members of the organization where innovation is instilled and ingrained along with the creation of a supportive organizational culture that allows innovation to flourish. Such an understanding defines necessary elements, considerations, and vernacular surrounding the term so that better decisions can be made, thereby enabling innovation and having a greater propensity to succeed.  相似文献   
58.
The main objective of this paper it to model the dynamic relationship between global averaged measures of Total Radiative Forcing (RTF) and surface temperature, measured by the Global Temperature Anomaly (GTA), and then use this model to forecast the GTA. The analysis utilizes the Data-Based Mechanistic (DBM) approach to the modelling and forecasting where, in this application, the unobserved component model includes a novel hybrid Box-Jenkins stochastic model in which the relationship between RTF and GTA is based on a continuous time transfer function (differential equation) model. This model then provides the basis for short term, inter-annual to decadal, forecasting of the GTA, using a transfer function form of the Kalman Filter, which produces a good prediction of the ‘pause’ or ‘levelling’ in the temperature rise over the period 2000 to 2011. This derives in part from the effects of a quasi-periodic component that is modelled and forecast by a Dynamic Harmonic Regression (DHR) relationship and is shown to be correlated with the Atlantic Multidecadal Oscillation (AMO) index.  相似文献   
59.
Driven by their members' demands and the need to adopt more combative legal strategies in order to oppose the deterioration of working and employment conditions, British trade unions have developed in‐house legal expertise and supported many individual and multiple claims. This article investigates the variation in unions' legal practices and examines their organisational responses to law and the role of compliance professionals in the regulation of employment litigation. It provides a nuanced account of the influence of legal rationality on the framing of union strategies and shows that, under certain conditions, trade unions are able to build multi‐pronged tactics by using litigation as a complement to other forms of action.  相似文献   
60.
This paper focuses on entrepreneurship by academic leaders. With the use of patents, inventions, and spin‐offs to measure commercialization, and directors, research group leaders, and business owners as academic leaders, results, using a sample of more than 2,500 German researchers, show differences across academic leaders and commercialization. Findings for spin‐offs are different from those for patents and inventions. Academic leaders in sciences were more likely to commercialize. Doctoral degrees helped patents by business owners and spin‐offs by group leaders, whereas female business owners and female group leaders faced challenges patenting and inventing, respectively. For business owners, age increased the likelihood of patenting but lowered spin‐offs.  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