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   4117篇
  免费   83篇
财政金融   879篇
工业经济   354篇
计划管理   646篇
经济学   874篇
综合类   82篇
运输经济   38篇
旅游经济   74篇
贸易经济   710篇
农业经济   189篇
经济概况   354篇
  2021年   17篇
  2020年   37篇
  2019年   63篇
  2018年   67篇
  2017年   75篇
  2016年   61篇
  2015年   47篇
  2014年   92篇
  2013年   499篇
  2012年   116篇
  2011年   105篇
  2010年   93篇
  2009年   113篇
  2008年   114篇
  2007年   114篇
  2006年   112篇
  2005年   102篇
  2004年   88篇
  2003年   105篇
  2002年   103篇
  2001年   91篇
  2000年   88篇
  1999年   94篇
  1998年   81篇
  1997年   71篇
  1996年   68篇
  1995年   63篇
  1994年   69篇
  1993年   52篇
  1992年   69篇
  1991年   64篇
  1990年   64篇
  1989年   62篇
  1988年   45篇
  1987年   56篇
  1986年   52篇
  1985年   93篇
  1984年   76篇
  1983年   74篇
  1982年   93篇
  1981年   78篇
  1980年   72篇
  1979年   62篇
  1978年   74篇
  1977年   60篇
  1976年   57篇
  1975年   48篇
  1974年   43篇
  1973年   37篇
  1971年   21篇
排序方式: 共有4200条查询结果,搜索用时 296 毫秒
141.
142.
143.
A novel gelatin system for use in oil spills at sea provides rapid immobilization of liquids upon demand.  相似文献   
144.
145.
Journal of Productivity Analysis - A driving force of economic development is growth in total factor productivity (TFP). Manufactured goods are, to a large extent, exports, and represent an...  相似文献   
146.
Electricity Market Restructuring: Reforms of Reforms   总被引:5,自引:1,他引:5  
Electricity systems present complicated challenges for public policy. In many respects these challenges are similar to those in other network industries in providing a balance between regulation and markets, public investment and private risk taking, coordination and competition. As with other such industries, naturally monopoly elements interact with potentially competitive services, but electricity has some unusual features that defy simple analogy to other network industries. Following a reversal of a long-term decline in real electricity prices, the last two decades of the twentieth century were for the United States a time of reform, reaction, and reforms of reforms in electricity systems, moving slowly towards greater reliance on competition and markets. Changing technology, new entrants in the generation market, and a legislative mandate to provide access to the essential transmission facility accelerated a process that required major innovations in institutions and operations. Complete laissez faire competition is not possible, and the details of an efficient competitive electricity market are neither obvious nor easy to put in place. The benefits of reform may be substantial, but they require careful attention to market design. A review of the past identifies some choices on the road ahead.  相似文献   
147.
Self-classification is used as an a priori approach to tourist typology and market segmentation. However, skepticism still surrounds its ability to incorporate the multidimensionality of tourist behavior. This study seeks to empirically verify the efficacy of a single-item self-classification approach. The robustness of this self-classification measure is examined by comparing it to a data-driven multidimensional psychographic approach in terms of its ability to predict the behaviors of tourists toward food-related destination consumption. Results suggest that the single-item self-classification approach performs equally well as the psychographic approach in segmenting food-related consumption behaviors. The implications and limitations of this study are also discussed.  相似文献   
148.
149.
This article examines the R&D/marketing interface conditions found within an extensive data base of new product development innovation projects. The incidence of different types of problems between these two important functions are analyzed and the effects of these observations on project outcomes are discussed. The article contains a number of recommendations for increasing the success rates of innovation projects by using a model that improves conditions at the R&D/marketing interface.  相似文献   
150.
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