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   2284篇
  免费   54篇
财政金融   349篇
工业经济   124篇
计划管理   322篇
经济学   612篇
综合类   55篇
运输经济   15篇
旅游经济   22篇
贸易经济   373篇
农业经济   159篇
经济概况   306篇
邮电经济   1篇
  2021年   16篇
  2020年   32篇
  2019年   44篇
  2018年   66篇
  2017年   76篇
  2016年   64篇
  2015年   30篇
  2014年   63篇
  2013年   234篇
  2012年   75篇
  2011年   102篇
  2010年   79篇
  2009年   81篇
  2008年   78篇
  2007年   62篇
  2006年   54篇
  2005年   45篇
  2004年   44篇
  2003年   30篇
  2002年   37篇
  2001年   29篇
  2000年   43篇
  1999年   30篇
  1998年   32篇
  1997年   32篇
  1996年   30篇
  1995年   18篇
  1994年   28篇
  1993年   33篇
  1992年   40篇
  1991年   30篇
  1990年   31篇
  1989年   22篇
  1988年   29篇
  1987年   23篇
  1986年   19篇
  1985年   35篇
  1984年   35篇
  1983年   41篇
  1982年   30篇
  1981年   33篇
  1980年   28篇
  1979年   30篇
  1978年   26篇
  1977年   16篇
  1976年   22篇
  1975年   21篇
  1974年   16篇
  1973年   26篇
  1972年   16篇
排序方式: 共有2338条查询结果,搜索用时 734 毫秒
11.
This study investigated the relationship between perception of environmental uncertainty (PEU) and environmental scanning behavior of Chief Executive Officers of 47 manufacturing firms in Nigeria. The results indicated that perceived uncertainty in the environment was significantly higher for the task environment sectors than for the remote environment sectors; and as perceived uncertainty increased in a sector of the environment, scanning frequency and scanning interests also increased. The results were compared with those of prior research in the area of environmental scanning. The results show both the economic and political legal sectors of the environment to be more salient for Nigerian manufacturing executives than for their American counterparts.  相似文献   
12.
The general design for the real-time electricity market presented in this paper optimizes and prices both real and reactive power simultaneously in an AC setting, where all assets—generation, load and transmission—are allowed to bid and are financially settled at the locational price times energy consumed or produced. The result is that transmission lines are compensated for both capacity and admittance, providing incentives for efficient operation of transmission-related assets such as FACTS devices, if price-taking behavior is assumed. Losses are incorporated into the design and become an operating cost for transmission. The market design is shown to be revenue neutral and, under some assumptions, nonconfiscatory.   相似文献   
13.
The United States (US) exports more than US$6 billion in agricultural commodities to the European Union(EU) each year, but one issue carries the potential to diminish this trade: use of biotechnology in food production. The EU has adopted more stringent policies towards biotechnology than the US. Understanding differences in European and American policies towards genetically modified (GM) foods requires a greater understanding of consumers’ attitudes and preferences. This paper reports results from the first large‐scale, cross‐Atlantic study to analyse consumer demand for genetically modified food in a non‐hypothetical market environment. We strongly reject the frequent if convenient assumption in trade theory that consumer preferences are identical across countries: the median level of compensation demanded by English and French consumers to consume a GM food is found to be more than twice that in any of the US locations. Results have important implications for trade theory, which typically focuses on differences in specialization, comparative advantage and factor endowments across countries, and for on‐going trade disputes at the World Trade Organization.  相似文献   
14.
In the 1980s a number of large corporations restructured their diversified businesses through divestitures. It is hypothesized that restructuring activity focused on firms at intermediate levels of diversification (e.g., related-linked) which have a mixture of related and unrelated business units. Results confirm this hypothesis which explains that such mixed corporate strategies create organizational and control inefficiencies in managing both related and unrelated types of business units. Restructured firms were also found to move towards two types of different internal capital markets (related and unrelated). Most restructuring firms moved toward lower levels of diversification (e.g., related-constrained), although some moved toward higher levels of diversification (e.g., unrelated business). Also, this study finds restructuring firms that changed their corporate strategy by reducing diversified scope increased their R&D intensity. Firms that restructured and increased their diversified scope decreased R&D intensity. This result suggested a partial substitution between diversification and R&D activity.  相似文献   
15.
16.
17.
18.
Many textbooks on project management present illustrations concerning the relative size of project attributes during different project phases. The derived models all have attributes in common, such as uncertainty, significance of decisions, and degree of freedom to maneuver, that are typically high in the beginning of the project and low in the end. At the same time, variables such as the accumulated cost and available information begin at low levels and end up at a high level at the end of the project. Based on empirical data from projects, this paper illustrates and quantifies one of these attributes, the freedom to maneuver, in different project phases.  相似文献   
19.
O. D. Anderson 《Metrika》1978,25(1):241-245
Summary A very simple deduction of a recently treated inequality is presented and some variations on this proof, drawing together various properties, are discussed. Closure of moving average processes undermultiplication is also mentioned.  相似文献   
20.
This paper describes the results of a mail survey to the educator membership of the American Marketing Association. Data were collected regarding beliefs about both the frequency of occurrence and severity of 59 ethical issues facing marketing faculty. The research questions examined include: What unethical practices are believed to most commonly occur? What practices are most severe? How do these beliefs vary by faculty rank and size and type of school? Implications for both the improvement of marketing education and for future research are provided.  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