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   25825篇
  免费   572篇
财政金融   4440篇
工业经济   1781篇
计划管理   4547篇
经济学   6101篇
综合类   421篇
运输经济   212篇
旅游经济   359篇
贸易经济   4261篇
农业经济   1299篇
经济概况   2897篇
信息产业经济   3篇
邮电经济   76篇
  2023年   148篇
  2021年   218篇
  2020年   360篇
  2019年   536篇
  2018年   589篇
  2017年   645篇
  2016年   620篇
  2015年   445篇
  2014年   686篇
  2013年   2763篇
  2012年   977篇
  2011年   1089篇
  2010年   971篇
  2009年   955篇
  2008年   886篇
  2007年   758篇
  2006年   783篇
  2005年   683篇
  2004年   521篇
  2003年   527篇
  2002年   478篇
  2001年   551篇
  2000年   480篇
  1999年   431篇
  1998年   483篇
  1997年   431篇
  1996年   435篇
  1995年   365篇
  1994年   382篇
  1993年   360篇
  1992年   366篇
  1991年   382篇
  1990年   348篇
  1989年   254篇
  1988年   267篇
  1987年   267篇
  1986年   248篇
  1985年   361篇
  1984年   357篇
  1983年   336篇
  1982年   287篇
  1981年   291篇
  1980年   285篇
  1979年   277篇
  1978年   227篇
  1977年   188篇
  1976年   185篇
  1975年   166篇
  1974年   152篇
  1973年   151篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
The purpose of this study was to assess the basis behavior of the Live Cattle Futures contract at the Chicago Mercantile Exchange (CME) before and after the 1995 contract changes. Additionally, an alternative method of basis calculation utilizing weighted mean futures prices versus settlement futures prices was compared to determine which method provides a better representation of the basis level. Within a regression model with heteroskedascity error framework, we found that the level of nearby basis in the period after June 1995 has shifted lower and the average monthly open interest of net commercial long positions has substantially increased after the contract modifications. These empirical results are consistent with the notion that more long activity entered the market in response to the contract modifications. Additionally, an alternative (new) measure of basis calculation (cash price minus weighted mean futures price) produced similar results to two other commonly used measures. In conclusion, the 1995 contract changes have neither increased nor decreased the volatility of live cattle basis. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:557–590, 2004  相似文献   
82.
In this paper we use a micro panel data set of Spanish manufacturing firms to measure the contributions of continuing firms and turnover to total factor productivity growth over the period 1990–1997. The paper proposes an approach to the decomposition of productivity growth that is based on the estimation of productivity distributions. We characterize the dynamics of productivity distributions defining counterfactual distributions and using non-parametric methods. The results we obtain indicate that incumbent firms are the main factor contributing to the change in the productivity distribution. Net entry contributes positively to TFP growth. Finally, changes in the relative weights of incumbent, entering and exiting firms produce a counter-cyclical movement of productivity.  相似文献   
83.
84.
85.
Consumer spending over the life span of today's 18‐ to 25‐year‐old emerging adults will reach into the $10 trillion range. Emerging adults are a powerful force in shaping demand for consumer products. The problem recognition styles associated with emerging adults can help marketers understand this group of consumers and provide insight into what kinds of products, services, and messages will appeal to them as lifelong consumers. The purpose of this study was to examine differences between men and women and among fashion consumer groups in fashion problem recognition style. Participants were a convenience sample of emerging adult consumers from one Midwestern university in the US, 136 men and 158 women who completed the Measure of Fashion Innovativeness and Opinion Leadership, Fashion Problem Recognition Style Scale, and provided demographic information. Both fashion followers and men reflected a need‐based approach to problem recognition. Both fashion change agents and women reflected a want‐based approach to problem recognition. Male fashion followers differed from all other groups in indicating a need‐based approach to problem recognition. This study built on previous work by examining differences in problem recognition style owing to fashion consumer group and gender. The basic premise behind problem recognition style was validated; that is, actual state (need‐based) vs. ideal state (want‐based) approaches to fashion problem recognition did relate to fashion consumer group membership and gender.  相似文献   
86.
Two questions formed the structure for examining the formal communication among researchers using the Journal of Consumer Studies and Home Economics (JCSHE) The first question pertained to the interrelationship between the literature published and cited in JCSHE. The second asked what impact the literature published in JCSHE had on authors publishing in other journals. By performing Bradford analysis using the 1,160 journal references cited by authors of 210 articles in the first seven volumes of JCSHE, 26 core journals were identified. JCSHE was ranked second because it was cited 54 times in 37 articles by 29 authors. Through citation analysis 17 citing articles published in 12 journals other than JCSHE were found. Seven of these 17 citing articles were published in other home economics journals.  相似文献   
87.
This paper analyzes countertrade as a special case of a customs union in which the countertrade agreement gives rise (as in customs union theory) to both trade-creating and trade-diverting effects. The net effects on welfare are ambiguous. A detailed case study from Egypt and brief examples from other countries illustrate the relevance of this interpretation .  相似文献   
88.
Local economic development (LED) planning is of major policy importance in post-apartheid South Africa. Although issues surrounding LED have attracted considerable policy attention, one neglected theme has been the role of tourism as a lead sector for LED. The aim of this article is to examine the planning and workings of one tourism-led LED initiative in South Africa. The case study is that of the Highlands Meander in Mpumalanga province, where five towns are collaborating in their LED initiatives in order to promote the area's tourism products. A key finding is that this growing tourism initiative is currently not benefiting local black communities. Recommendations are offered for developing a pro-poor tourism initiative.  相似文献   
89.
90.
During the past decade a number of countries imposed capital controls that had two distinguishing features: they were asymmetric, in that they were designed principally to discourage capital inflows, and they were temporary. This paper studies formally the consequences of these policies, calibrates their potential effectiveness, and assesses their welfare implications in an environment in which the level of capital inflows can be sub-optimal. In addition, motivated by the fact that these types of controls have often been left in place after the dissipation of the shock that lead to the controls being implemented, the paper evaluates the welfare cost of procrastination in removing these types of controls.  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