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   39514篇
  免费   649篇
财政金融   7287篇
工业经济   2490篇
计划管理   6356篇
经济学   8884篇
综合类   701篇
运输经济   165篇
旅游经济   371篇
贸易经济   7972篇
农业经济   1055篇
经济概况   4245篇
信息产业经济   46篇
邮电经济   591篇
  2023年   127篇
  2021年   152篇
  2020年   302篇
  2019年   448篇
  2018年   2788篇
  2017年   2573篇
  2016年   1755篇
  2015年   421篇
  2014年   636篇
  2013年   2559篇
  2012年   1097篇
  2011年   2691篇
  2010年   2446篇
  2009年   2205篇
  2008年   2138篇
  2007年   2409篇
  2006年   631篇
  2005年   828篇
  2004年   928篇
  2003年   1037篇
  2002年   738篇
  2001年   539篇
  2000年   553篇
  1999年   490篇
  1998年   518篇
  1997年   443篇
  1996年   418篇
  1995年   373篇
  1994年   374篇
  1993年   390篇
  1992年   426篇
  1991年   407篇
  1990年   335篇
  1989年   278篇
  1988年   250篇
  1987年   245篇
  1986年   286篇
  1985年   404篇
  1984年   372篇
  1983年   359篇
  1982年   313篇
  1981年   314篇
  1980年   274篇
  1979年   272篇
  1978年   265篇
  1977年   190篇
  1976年   198篇
  1975年   193篇
  1974年   154篇
  1973年   158篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
141.
The linkage between macroeconomic policies and agricultural commodity trade has become an important research issue of agricultural economists. This paper investigates the macroeconomic linkage of soybean trade competition between the exporting countries of the United States, Brazil, and Argentina in the EC-12 and Japan import markets. It is argued that U.S. monetary growth may have important impacts on the competitive position of U.S. soybean exports through exchange rates. Two relationships are investigated: (a) the effects of U.S. monetary growth on the agricultural trade weighted exchange rates, and (b) the responsiveness of agricultural commodity prices and U.S. exports to exchange rate movements. Results indicate that a weak dollar increases imports of soybeans and soymeal significantly which serves to increase the equilibrium world price and increase both U.S. and Brazil/Argentina exports in the long run. However, during periods of more expansionary U.S. monetary policy there is little evidence of significant increases in market share position for U.S. soybeans and soymeal in world markets.  相似文献   
142.
S. B. Kim  D. S. Bai 《Metrika》1992,39(1):85-93
Summary Economic design of one-sided screening procedures for improving outgoing product quality based on a screening variable is considered for the case with all parameters unknown. It is assumed that the performance and screening variables are jointly normally distributed and that costs are incurred by screening inspection, acceptance of an imperfect item, and disposition of a rejected one. A method for finding optimal cutoff value based on the predictive distribution is presented.  相似文献   
143.
144.
A conceptual framework of anonymity in Group Support Systems   总被引:2,自引:2,他引:0  
As the development and use of automated systems for collaborative work grows, the need for a better understanding of these systems becomes more important. Our focus is on one type of system, a Group Support System (GSS) and, in particular, on one important aspect of a GSS—anonymity. A conceptual framework for the study of anonymity in a GSS is presented, which describes the general classes of variables and their relationships. These variables include the factors that influence anonymity in a GSS, types of anonymity, and the effects of anonymity on a message sender, receiver, group process, and outcome. Each of these variables is discussed with working propositions presented for important group process and outcome measures. The objectives of this article are to highlight the importance and complexity of anonymity, to act as a guide for empirical investigations of anonymity, and to influence future GSS development and use.  相似文献   
145.
146.
Rudy Moenaert, William Souder, Arnoud De Meyer, and Dirk Deschoolmeester report the results of their study of forty technologically innovative Belgian companies to examine the interaction between marketing and R&D. They studied one commercially successful and one commercially unsuccessful technological product innovation project in each participating company and collected data from one marketing and one R&D respondent per project. Communication flows between marketing and R&D are increased under conditions involving formalization of projects, decentralization, positive interfunctional climate, and role flexibility.  相似文献   
147.
Suppose an investor has a fixed decision horizon and an appropriate utility function for measuring his or her utility of wealth. If there are only two investment vehicles, a risky and a risk-free asset, then the optimal investment strategy is such that, at any time, the amount invested in the risky asset must be the product of his or her “current risk tolerance” and the risk premium on the risky asset, divided by the square of the diffusion coefficient of the risky asset. In the case of more than one risky asset, the optimal investment strategy is similar, with the ratios of the amounts invested in the different risky assets being constant over time.  相似文献   
148.
This paper discusses the revolutionary new right introduced by the Trade Union Reform and Employment Rights Act 1993 for consumers to seek a court order to halt unlawful industrial action which disrupts the supply of goods or services, regardless of whether they have any enforceable right to the goods or services in question. Even more unusually, public funding is available to conduct these proceedings irrespective of the applicant's means where the industrial action is organised by a trade union. The paper analyses the nature of the right, locates it within the broader framework of remedies for the non-provision or inadequate provision of goods or services, and assesses the wider implications of the right for consumer policy.  相似文献   
149.
The 1992 Horizontal Merger Guidelines of the Department of Justice and the Federal Trade Commission outline an enforcement policy which makes a long overdue break with its predecessors in awarding no decisive or predominant role to market concentration as a criterion of anticompetitive effect. However, the new policy does not provide an adequate substitute criterion: the tests that it prescribes for screening merger proposals are so specified that a potentially large proportion of anticompetitive mergers can escape challenge without showing any promise of improving efficiency. The time is ripe for a comprehensive inquiry aimed at formulating a more satisfactory policy.  相似文献   
150.
Our examination of the cross-section of expected returns reveals economically and statistically significant compensation (about 6 to 9 percent per annum) for beta risk when betas are estimated from time-series regressions of annual portfolio returns on the annual return on the equally weighted market index. The relation between book-to-market equity and returns is weaker and less consistent than that in Fama and French (1992). We conjecture that past book-to-market results using COMPUS-TAT data are affected by a selection bias and provide indirect evidence.  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