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   37928篇
  免费   914篇
  国内免费   1篇
财政金融   6699篇
工业经济   2765篇
计划管理   6407篇
经济学   8807篇
综合类   640篇
运输经济   255篇
旅游经济   509篇
贸易经济   6545篇
农业经济   1702篇
经济概况   4405篇
信息产业经济   6篇
邮电经济   103篇
  2023年   156篇
  2021年   216篇
  2020年   400篇
  2019年   613篇
  2018年   1237篇
  2017年   1251篇
  2016年   1015篇
  2015年   502篇
  2014年   799篇
  2013年   3511篇
  2012年   1189篇
  2011年   1689篇
  2010年   1459篇
  2009年   1531篇
  2008年   1393篇
  2007年   1466篇
  2006年   901篇
  2005年   824篇
  2004年   799篇
  2003年   845篇
  2002年   734篇
  2001年   727篇
  2000年   704篇
  1999年   606篇
  1998年   681篇
  1997年   630篇
  1996年   630篇
  1995年   539篇
  1994年   552篇
  1993年   531篇
  1992年   591篇
  1991年   578篇
  1990年   511篇
  1989年   389篇
  1988年   372篇
  1987年   421篇
  1986年   398篇
  1985年   572篇
  1984年   596篇
  1983年   553篇
  1982年   483篇
  1981年   483篇
  1980年   475篇
  1979年   477篇
  1978年   340篇
  1977年   293篇
  1976年   273篇
  1975年   264篇
  1974年   230篇
  1973年   221篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
Bruce E. Tonn 《Futures》2004,36(3):335-346
This paper imagines a US society that is obsessed with survival over the very long-term, not just over the next decade or two but over very long-time spans measured in the thousands and millions of years. Given that Americans tend to be achievement-oriented, it is plausible that they could become enthralled with this ultimate challenge. It is folly to argue that a fundamental change in the focus of the national psyche from consumerism to longer-term pursuits will happen anytime soon but the paper suggests that dissatisfaction with consumerism, growing environmentalism, increasingly felt limits of non-renewable resources, the increasing extinction of species, and a tiredness with global power politics as usual and its seemingly inexplicable violence and terrorism can someday lead to archetypal change in our society. In anticipation of this change, this paper presents a roadmap of how we could get from here, consumerism, to there, focused on the journey of life through time and space. The paper also outlines threats that humans must address to maintain the journey of earth-life through time and space; and presents a broad range of activities designed to meet the threats and capitalize on important opportunities. Finally, the paper explores how society would be transformed to meet the challenges and what sectors of today’s economy could be expected to contribute workers to a bourgeoning science and technology workforce and concludes with a few remarks about the future to come.  相似文献   
72.
73.
74.
回顾1.需求7月份,世界主要经济体跌幅趋缓,显现经济复苏迹象。中国经济更是率先走出低迷,增长提速,第二季度国内生产总值同比增长7.9%。基础设施投资起到了决定性的作用。7月份固定资产投资延续上半年的趋  相似文献   
75.
If actively managed mutual funds suffer from diminishing returns to scale, funds should alter investment behavior as assets under management increase. Although asset growth has little effect on the behavior of the typical fund, we find that large funds and small‐cap funds diversify their portfolios in response to growth. Greater diversification, especially for small‐cap funds, is associated with better performance. Fund family growth is related to the introduction of new funds that hold different stocks from their existing siblings. Funds with many siblings diversify less rapidly as they grow, suggesting that the fund family may influence a fund's portfolio strategy.  相似文献   
76.
77.
This article investigates the determinants of real estate investment trusts (REIT) portfolio investment and institutional REIT ownership using multivariate Tobit regressions. We contend that many institutional investors take larger positions in more liquid assets like REIT stocks, as compared with private real estate equities, because of liquidity considerations. Consistent with this contention, we find that liquidity constraints are significantly related to REIT portfolio investment by institutional investors. We also find that institutional investors have different preferences for REIT stocks than do other investors; they generally prefer larger, more liquid REIT stocks.  相似文献   
78.
A survey conducted in Mississippi, Texas, Indiana, and Nebraska elicited producers' preferences for various farm policy changes. This permitted examination of the diversity of preferences that single-state studies have not allowed. Five policy choices, including deficiency payments, loan programs, crop insurance, export programs, and disaster payments were examined. Logit model results predicting producer preferences for each of the five dichotomous policy choices are reported. Explanatory variables based on expected utility theory such as risk aversion, price and yield variability, and price–yield correlation are significant in various models.  相似文献   
79.
This paper focuses on the development of a theoretical scheme describing the transformation of primary incomes into end consumption and savings in the Russian economy. This scheme is basically a system of interrelated tables reflecting the distribution of primary incomes across the institutional sectors and their further reallocation and use. The scheme makes allowances for the specific features of the Russian economy and existing statistics. In terms of methodology, it is coordinated with the interindustry balance in current buyer prices and, from the theoretical standpoint, describes the connection between Quadrant II and Quadrant III of the balance. Therefore, the proposed system of tables is treated in the paper as Quadrant IV of the interindustry balance. The theoretical scheme is used by the authors as a necessary basis for constructing an empirical model of the relationship between value added and end product, which will be published in the next issue of this journal.  相似文献   
80.
M. P.  A. M.  M. P.   《Technovation》2002,22(12)
Telework as an integration of Information and Telecommunication Technologies with Human Resources management, means a new job organisation paradigm for companies working in the New Economy. However there are very few empirical studies that have analysed the perception differences of telework benefits and barriers in industrial and service companies. This paper contributes with empirical data to the relationship between the use of telework techniques and the implementation of this new work organisation with the company's operations strategy. The paper uses data from Spanish companies to test the relationship between innovation, employee training, and other production strategy performance parameters with the feasibility of telework adoption.  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