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   764篇
  免费   46篇
财政金融   119篇
工业经济   64篇
计划管理   135篇
经济学   190篇
综合类   13篇
运输经济   13篇
旅游经济   12篇
贸易经济   150篇
农业经济   51篇
经济概况   61篇
邮电经济   2篇
  2023年   9篇
  2022年   2篇
  2021年   6篇
  2020年   20篇
  2019年   29篇
  2018年   47篇
  2017年   21篇
  2016年   28篇
  2015年   16篇
  2014年   34篇
  2013年   98篇
  2012年   40篇
  2011年   39篇
  2010年   35篇
  2009年   55篇
  2008年   35篇
  2007年   24篇
  2006年   31篇
  2005年   23篇
  2004年   14篇
  2003年   12篇
  2002年   25篇
  2001年   10篇
  2000年   10篇
  1999年   13篇
  1998年   11篇
  1997年   3篇
  1996年   14篇
  1995年   8篇
  1994年   6篇
  1993年   8篇
  1992年   9篇
  1991年   8篇
  1990年   6篇
  1989年   2篇
  1988年   3篇
  1987年   3篇
  1986年   6篇
  1985年   3篇
  1984年   3篇
  1982年   4篇
  1981年   7篇
  1980年   2篇
  1977年   3篇
  1976年   2篇
  1973年   2篇
  1971年   4篇
  1964年   2篇
  1963年   2篇
  1959年   2篇
排序方式: 共有810条查询结果,搜索用时 15 毫秒
61.
62.
Upland areas provide UK society with many important functions, goods and services, but have experienced a number of disturbing trends and face an uncertain future. This paper outlines historic, current and future drivers of environmental, economic, socio-cultural and policy change in UK uplands, and assesses how these have affected or are likely to affect ways in which land is used and the provision of ecosystem services. Information is synthesised into scenarios summarising a range of possible futures anticipated for UK uplands to 2060 and beyond. Finally, innovations in science, technology, governance and policy are evaluated that could enable uplands to continue providing key ecosystem services under a range of scenarios. The paper concludes that many upland areas will need to be prepared for significant reductions in grazing and prescribed burning. Conversely, other areas could experience agricultural intensification, for example significant increases in grazing or an expansion of arable or bioenergy crops into upland valleys, due to anticipated increases in global demand for food and energy. These scenarios will take place in the context of climate change. Many may take place together and may interact with each other, with complex and unpredictable implications for the upland environment, economy and society. In this context, a number of advances are needed in science, technology and policy to maintain viable upland communities and the future provision of ecosystem services. These may include funding for ecological and hydrological restoration via carbon offsetting or other means. It may also involve advances in ecosystem service modelling, mapping and valuation, which through stakeholder participation could facilitate more integrated rural planning. New forms of environmental governance need to be explored that can empower those interested in developing upland economies to maintain thriving upland communities, while managing the ecosystem services they provide as efficiently as possible.  相似文献   
63.
In this article, we examine the effect of talent identification on employee attitudes. Building on social exchange theory, we analyze the association between employees' perceptions about whether or not they have been formally identified as “talent” and the following attitudinal outcomes: commitment to increasing performance demands, building skills, and supporting strategic priorities; identification with the unit and the multinational enterprise; and turnover intentions. Our analyses of 769 managers and professionals in nine Nordic multinational corporations reveal a number of differences between employees who perceive that they have been identified as “talent” and those who either perceive that they have not been identified or do not know whether they have been identified. We found only limited differences between the two latter categories.  相似文献   
64.
Cases of airline passengers developing deep vein thromboses and contracting infectious diseases during flights have led to airlines' provision of in-flight customer health advice coming under increased scrutiny. By means of a manifest content analysis of the information provided in 50 international airlines’ in-flight magazines, this paper examines the nature and presentation of the health advice that is supplied and comments on the different approaches individual airlines adopt.  相似文献   
65.
Federal lab commercialization is explored: (1) by analyzing US government patents and (2) in a qualitative analysis of one NASA lab's patents. Tests apply to three distinct sets of patents, 1963–94: NASA, all other US government, and a random sample of all US inventors' patents. The federal patenting rate plummeted in the 1970s. Consistent with increasing commercialization, both NASA's and other federal agencies' rates recovered in the 1980s. The case study finds citations to be a valid but noisy measure of technology spillovers. Excluding 'spurious' cites, two-thirds of cites to patents of NASA-Lewis' Electro-Physics Branch were evaluated as involving spillovers.  相似文献   
66.
67.
Goal-setting has become a popular and effective motivational tool, utilized by practitioners and substantiated with decades of empirical research. However, the potential for goal-setting to enhance performance may come at the cost of ethical behavior. I propose a theoretical model linking attributes of goals and goal-setting practices to unethical behavior through two psychological mechanisms – ethical recognition and moral disengagement; and addressing the moderating role of individual differences (e.g., goal-commitment and conscientiousness), as well as the broader organizational ethical context.  相似文献   
68.
We investigate jump memory using an extensive database of short‐term S&P 500 index options. Jump memory refers to the attenuation of the implied jump intensity and magnitude parameters following a crash event. We use a genetic algorithm to obtain a time series of implied parameter estimates and posit behavioral and rational explanations for parameter attenuation following a crash event. We find that a nested form of the jump‐diffusion model sharpens the remaining parameter estimates and has a negligible effect on pricing accuracy.  相似文献   
69.
70.
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