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   613篇
  免费   46篇
财政金融   121篇
工业经济   62篇
计划管理   101篇
经济学   119篇
综合类   5篇
运输经济   17篇
旅游经济   60篇
贸易经济   99篇
农业经济   35篇
经济概况   40篇
  2023年   5篇
  2022年   5篇
  2021年   11篇
  2020年   20篇
  2019年   31篇
  2018年   31篇
  2017年   34篇
  2016年   35篇
  2015年   23篇
  2014年   27篇
  2013年   103篇
  2012年   29篇
  2011年   28篇
  2010年   27篇
  2009年   24篇
  2008年   18篇
  2007年   23篇
  2006年   14篇
  2005年   14篇
  2004年   7篇
  2003年   12篇
  2002年   19篇
  2001年   4篇
  2000年   11篇
  1999年   10篇
  1998年   6篇
  1997年   8篇
  1996年   7篇
  1995年   3篇
  1994年   3篇
  1992年   3篇
  1991年   5篇
  1990年   3篇
  1988年   2篇
  1986年   2篇
  1985年   4篇
  1984年   2篇
  1982年   3篇
  1981年   6篇
  1980年   6篇
  1979年   3篇
  1977年   3篇
  1976年   5篇
  1975年   3篇
  1974年   4篇
  1973年   2篇
  1972年   2篇
  1971年   1篇
  1968年   1篇
  1966年   1篇
排序方式: 共有659条查询结果,搜索用时 390 毫秒
541.
542.
543.
Fair imposition     
We introduce a new mechanism-design problem called fair imposition. In this setting a center wishes to fairly allocate tasks among a set of agents whose cost structures are known only to them, and thus will not reveal their true costs without appropriate incentives. The center, with the power to impose arbitrary tasks and payments on the agents, has the additional goal that his net payment to these agents is never positive (or, that it is tightly bounded if a loss is unavoidable). We consider two different notions of fairness that the center may wish to achieve. The central notion, which we call k-fairness, is in the spirit of max-min fairness. We present both positive results (in the form of concrete mechanisms) and negative results (in the form of impossibility theorems) concerning these criteria. We also briefly discuss an alternative, more traditional interpretation of our setting and results, in the context of auctions.  相似文献   
544.
545.
The structure and infrastructure of the Indian research literature were determined. A representative database of technical articles was extracted from the Science Citation Index/Social Science Citation Index (SCI/SSCI) [SCI. Certain data included herein are derived from the Science Citation Index/Social Science Citation Index prepared by the THOMSON SCIENTIFIC®, Inc. (Thomson®), Philadelphia, Pennsylvania, USA: ©Copyright THOMSON SCIENTIFIC® 2006. All rights reserved. [1]] for 2005, with each article containing at least one author with an India address. Document clustering was used to identify the main technical themes (core competencies) of Indian research. Aggregate India bibliometrics were also performed, emphasizing the value of collaborative research to India. A unique mapping approach was used to identify networks of organizations that published together, networks of organizations with common technical interests, and especially those organizations with common technical interests that did not co-publish extensively. Finally, trend analyses were performed using other year data from the SCI/SSCI to place the 2005 results in their proper historical context.  相似文献   
546.
547.
This paper adapts two recent developments from the bibliometric literature to the problem of assessing the return performance of a financial asset. The result is a quantity-of-quality metric, which is both nonparametric and moment-free. As such, it offers a nonstandard perspective on the informational patterns in asset returns, and accordingly can complement traditional moment-based asset evaluation methods. The proposed approach is simple to apply, and while moment-free, captures intuitively important aspects of asset performance such as location, upside potential, downside risk, and volatility. It can also be expressed as a reward-to-risk ratio, which serves as a counterpart to the Sharpe ratio. Empirical and simulation results suggest that, relative to the Sharpe ratio, the proposed approach prefers assets with moderately higher means and standard deviations, and more favorable skewness.  相似文献   
548.
The Center for Financial Stability (CFS) has initiated a new Divisia monetary aggregates database, maintained within the CFS program called Advances in Monetary and Financial Measurement (AMFM). The Director of the program is William A. Barnett, who is the originator of Divisia monetary aggregation and more broadly of the associated field of aggregation-theoretic monetary aggregation. The international section of the AMFM web site is a centralized source for Divisia monetary aggregates data and research for over 40 countries throughout the world. The components of the CFS Divisia monetary aggregates for the United States reflect closely those of the current and former simple-sum monetary aggregates provided by the Federal Reserve. The first five levels, M1, M2, M2M, MZM, and ALL, are composed of currency, deposit accounts, and money market accounts. The liquid asset extensions to M3, M4-, and M4 resemble in spirit the now discontinued M3 and L aggregates, including repurchase agreements, large denomination time deposits, commercial paper, and Treasury bills. When the Federal Reserve discontinued publishing M3 and L, the Fed stopped providing the consolidated, seasonally adjusted components. Also the Fed no longer provides the interest rates on the components. With so much of the needed component quantity and interest-rate data no longer available from the Federal Reserve, decisions about data sources needed in construction of the CFS aggregates have been far from easy and sometimes required regression interpolation. This paper documents the decisions of the CFS regarding United States data sources at the present time, with particular emphasis on Divisia M3 and M4.  相似文献   
549.
This paper explores whether firm‐specific information events drive economically relevant positive and negative stock price changes and trading volume and, if so, the nature of such information. We find that no less than 65% of significant price changes and trading volume movements in our sample of FTSE 350 companies can be readily explained by public domain information contradicting the thesis that corporate news is not a primary driver, and that share price changes and trading volume activity are driven by factors unrelated to information flows per se. In addition, we find that a parsimonious set of news categories represent the key drivers. Sell‐side analyst stock recommendations and earnings forecast revisions as a class, unaccompanied by other news releases, dominate all other news categories in terms of significant market reaction. However, taking into account the relative magnitude of market response to different news releases, firms' formal accounting disclosures dominate within this domain. As such, we conclude these are not fully anticipated by apparently more timely market disclosures, and that the existence of news services and the activities of the sell‐side analyst are not substitutes for a firm's interim and preliminary results.  相似文献   
550.
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