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   513篇
  免费   26篇
财政金融   71篇
工业经济   17篇
计划管理   93篇
经济学   190篇
综合类   1篇
运输经济   3篇
旅游经济   1篇
贸易经济   77篇
农业经济   47篇
经济概况   39篇
  2023年   10篇
  2022年   3篇
  2021年   7篇
  2020年   11篇
  2019年   17篇
  2018年   18篇
  2017年   22篇
  2016年   23篇
  2015年   8篇
  2014年   17篇
  2013年   68篇
  2012年   20篇
  2011年   14篇
  2010年   15篇
  2009年   20篇
  2008年   16篇
  2007年   13篇
  2006年   8篇
  2005年   12篇
  2004年   16篇
  2003年   14篇
  2002年   18篇
  2001年   11篇
  2000年   12篇
  1999年   14篇
  1998年   5篇
  1997年   11篇
  1996年   7篇
  1995年   3篇
  1994年   5篇
  1993年   6篇
  1992年   7篇
  1991年   6篇
  1990年   8篇
  1989年   3篇
  1988年   4篇
  1987年   4篇
  1985年   8篇
  1984年   3篇
  1983年   3篇
  1982年   5篇
  1981年   5篇
  1979年   6篇
  1977年   5篇
  1976年   3篇
  1975年   2篇
  1973年   4篇
  1970年   2篇
  1968年   3篇
  1967年   2篇
排序方式: 共有539条查询结果,搜索用时 15 毫秒
71.
72.
73.
With declining enrollments, metropolitan school districts are faced with problems of property disposition. A school facilities planning and management model utilizing a linear programming approach enables assessment of alternative uses for school facilities. The objective in this study is to minimize expenditures subject to constraints which include a limit to distance traveled, racial ethnic quotas, and overhead costs, such as transportation, maintenance and energy. An economic post-optimal cost sensitivity analysis of the proposed options is presented and also a comparison of this approach to school management with others found in the literature.  相似文献   
74.
Is Wheat a Homogeneous Product?   总被引:1,自引:0,他引:1  
A hedonic approach is used to test for two kinds of product differentiation for wheat. It is shown that wheat is differentiated by end use and by country of origin. This simply recognizes the fact that buyers purchasing wheat for different purposes put different weights on quality criteria and that country-specific factors such as weather as well as grading and inspection systems matter. The results suggest that between 1980 and 1988, wheat protein content had a significant influence on price. This influence varies over time and across wheat categories.  相似文献   
75.
This paper extends He and Pearson's (1991) martingale approach to the study of optimal intertemporal consumption and portfolio policies with incomplete markets and short-sale constraints to a framework in which no assumptions are made on the price process for the securities. We show how both their characterization of the budget-feasible set and duality result can be extended to account for an unbounded set II of Arrow-Debreu state prices compatible with the arbitrage-free assumption. We also supply a (fairly general) sufficient condition for II to be bounded, as required in their setting.  相似文献   
76.
77.
78.
The patterns of development of 250 high-technology firms, are examined. As of 1980, 36.8% of these firms had discontinued, 30.8% were surviving and independent, and a remarkably high 32.4% had been acquired. The characteristics of both the acquired and acquiring firms are examined and reveal distinctive patterns of acquisition.  相似文献   
79.
80.
At the Working Union of Austrian Collcctive Economy autumn assembly, held on 3 December 1954, the principal speaker was Dr. Kreisky, and we are reproducing the following interesting extracts from his address.  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