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   4807篇
  免费   203篇
  国内免费   87篇
财政金融   586篇
工业经济   350篇
计划管理   903篇
经济学   774篇
综合类   488篇
运输经济   27篇
旅游经济   74篇
贸易经济   1262篇
农业经济   244篇
经济概况   389篇
  2024年   4篇
  2023年   85篇
  2022年   66篇
  2021年   113篇
  2020年   164篇
  2019年   139篇
  2018年   134篇
  2017年   176篇
  2016年   160篇
  2015年   152篇
  2014年   295篇
  2013年   487篇
  2012年   319篇
  2011年   361篇
  2010年   287篇
  2009年   297篇
  2008年   367篇
  2007年   315篇
  2006年   313篇
  2005年   198篇
  2004年   161篇
  2003年   110篇
  2002年   87篇
  2001年   85篇
  2000年   58篇
  1999年   34篇
  1998年   35篇
  1997年   26篇
  1996年   22篇
  1995年   10篇
  1994年   11篇
  1993年   5篇
  1992年   5篇
  1991年   6篇
  1990年   2篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1985年   2篇
  1983年   2篇
  1982年   1篇
排序方式: 共有5097条查询结果,搜索用时 31 毫秒
21.
浅析石油化工项目产品市场分析   总被引:2,自引:0,他引:2  
市场分析是项目前期的重要工作之一,目前尚未赢得人们足够的重视。国外的投资咨询公司对石油化工项目的产品市场分析有其一套比较完整的操作程序和评估体系,以BOPP为案例介绍了市场分析的思路和方法,并且指出市场分析作为一种新的理念,必须进一步深化和细化,逐步加以完善。  相似文献   
22.
Many studies examine firm private knowledge, but purport to be generalizable to the totality of firm knowledge, both public and private. This study demonstrates that public and private firm knowledge are empirically separable constructs that have significant and yet different influences on innovative outcomes. The example of product development effectiveness within this study shows that both public and private knowledge are significantly related to product development quality; however, public knowledge is negatively related to quality lapses while private knowledge is positively related to quality lapses. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
23.
Diffusion of Products with Limited Supply and Known Expiration Date   总被引:3,自引:0,他引:3  
In this paper, we provide a model for diffusion of products, which are available in limited quantity until a known expiration date, after which the unsold products have no value. We consider the case of a performing arts company. The model development is built on the foundation of classical product diffusion model by Bass (1969) and the psychological effect known as the scarcity principle (Cialdini, 1985). Our empirical analysis results show that the proposed model can provide significant improvement in prediction of the products characterized by the scarcity effect.  相似文献   
24.
Guided by notions from the literature on organizational learning, this paper investigates how product line experimentation and organizational performance change across the careers of top managers. Its subjects are the studio heads who ran all the major Hollywood film studios from 1936 to 1965. The study found first, that product line experimentation declines over the course of executive tenures; second, that there is an inverse U‐shaped relationship between top executive tenure and an organization's financial performance; and third, that product line experimentation is more likely to benefit financial performance late in top executives' tenures. These findings are consistent with a three‐stage ‘executive life cycle’. During the early years of their tenures, top managers experiment intensively with their product lines to learn about their business; later on their accumulated knowledge allows them to reduce experimentation and increase performance; finally, in their last years, executives reduce experimentation still further, and performance declines. Copyright © 2001 John Wiley & Sons, Ltd.  相似文献   
25.
We use a vertical product differentiation model under partial market coverage to study the social welfare optimum and duopoly equilibrium when convex costs of quality provision are either fixed or variable in terms of production. We show the following new results. First, under fixed costs, the social planner charges a uniform price for the single variant that just covers costs of quality provision. Like the duopoly equilibrium, this socially optimal pricing entails a partially uncovered market, but a smaller share of the market is served compared with the duopoly equilibrium. Second, for the variable cost case, it is socially optimal to provide both high‐ and low‐quality variants, but market shares need not be equal. This differs from the result in fully covered markets. Third, in the duopoly equilibrium, the quality spread is too wide under variable costs relative to the social optimum. Under fixed costs, the duopoly produces two variants, but quality is too low relative to the social optimum, which has only one variant.  相似文献   
26.
Transition matrix techniques are used to relate the past and present performance of pension fund portfolios. In particular, funds are ranked to study the tendency of portfolios to remain in the same quartile of the ranking as they were in the previous period. For raw returns, funds in both of the top quartiles are found to be more likely to remain in the same quartile than would be expected by chance. This result can be taken as limited evidence for the consistency of performance. Similar systemic effects are observed on a risk-adjusted basis. There appears to be clear evidence that some fund managers can offer a degree of consistent good performance.  相似文献   
27.
整合产品服务系统——实现循环经济的新途径   总被引:1,自引:0,他引:1  
整合产品服务系统(IPSS)是一种社会组织创新战略,通过将目前仅生产和销售有形产品的相互分离的工业生产与服务体系有机地整合,以比传统生产和消费模式更低的环境代价,有效满足顾客需求。作为对传统商业模式的革命性变革,整合产品服务系统是促进可持续发展和循环经济的有效手段和必由之路。本文讨论其产生的背景,给出其定义和理论框架,介绍其发展历程,以便为我国发展循环经济提供借鉴。  相似文献   
28.
农产品物流不畅的原因分析及改善   总被引:3,自引:0,他引:3  
许亚 《物流科技》2006,29(6):64-66
农产品物流不畅影响农民的增收,而农产品物流不畅的根源在于我国农业传统的生产方式、经营方式和技术.改善和发展农产品物流需要政府和企业共同努力.  相似文献   
29.
废旧电子产品回收网络研究   总被引:5,自引:0,他引:5  
废旧电子产品的污染问题已经越来越被重视,孕育在废旧电子产品的价值也已经被企业逐渐认识.而现行的回收网络过于简单,不利于产品的回收处理和价值恢复。本文从讨论废旧电子产品的污染和回收价值谈起.就电子产品回收的璁状提出了一个以制造企业为中心、全社会广泛参与的回收网络模型。  相似文献   
30.
基于物联网的自动入库管理系统及其应用研究   总被引:5,自引:1,他引:5  
谢勇  王红卫 《物流技术》2007,26(4):90-93
利用RFID电子标签作为产品识别的手段,利用物联网来获取入库产品的详细信息并自动生成入库单,从而提出了基于物联网的自动入库管理系统的基本原理,对系统的结构和功能进行了分析,并通过应用实例说明了系统的优点。  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