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   24589篇
  免费   4515篇
  国内免费   223篇
财政金融   1987篇
工业经济   2408篇
计划管理   4663篇
经济学   5618篇
综合类   2476篇
运输经济   218篇
旅游经济   130篇
贸易经济   5127篇
农业经济   3445篇
经济概况   3218篇
信息产业经济   7篇
邮电经济   30篇
  2024年   185篇
  2023年   468篇
  2022年   536篇
  2021年   692篇
  2020年   839篇
  2019年   1122篇
  2018年   922篇
  2017年   1059篇
  2016年   930篇
  2015年   1178篇
  2014年   1488篇
  2013年   1775篇
  2012年   2220篇
  2011年   2261篇
  2010年   2246篇
  2009年   1851篇
  2008年   1671篇
  2007年   1733篇
  2006年   1641篇
  2005年   1393篇
  2004年   750篇
  2003年   510篇
  2002年   400篇
  2001年   319篇
  2000年   185篇
  1999年   111篇
  1998年   95篇
  1997年   80篇
  1996年   67篇
  1995年   44篇
  1994年   53篇
  1993年   55篇
  1992年   73篇
  1991年   96篇
  1990年   35篇
  1989年   36篇
  1988年   18篇
  1987年   11篇
  1985年   13篇
  1984年   13篇
  1983年   14篇
  1982年   20篇
  1981年   9篇
  1979年   8篇
  1978年   9篇
  1973年   7篇
  1972年   7篇
  1971年   6篇
  1969年   9篇
  1963年   9篇
排序方式: 共有10000条查询结果,搜索用时 296 毫秒
21.
In this paper, we examine the warrant price and stock price reactions to the announcement of warrant life extensions by REITs. As predicted by option pricing theory, warrant prices increase in response to these extensions. The stocks of REITs making the extension announcements experience average abnormal returns that are not significantly different from zero. Thus, total firm value appears to increase, with the gains accruing primarily to the warrantholders.  相似文献   
22.
This paper considers the impact of Programa de Educación, Salud y Alimentación ( PROGRESA ), a large Mexican rural anti-poverty programme that had an evaluation sample in which overall treatment was randomly assigned to some communities but not others, on child nutrition. When we examine the impact of PROGRESA based on the presumption of randomized allocations, we find that PROGRESA had no or even a negative impact on child nutrition. However, not all children designated to receive nutritional supplements actually did so. Our preferred estimates – child fixed-effects estimates that control for unobserved heterogeneity that is correlated with access to the supplement – indicate a significantly positive and fairly substantial programme effect of the nutritional supplements on children 12–36 months. They imply an increase of about a sixth in mean growth per year for these children and a lower probability of stunting. Effects are somewhat larger for children from poorer communities but whose mothers are functionally literate. The long-term consequences of these improvements are non-trivial; its impact working through adult height alone could result in a 2.9% increase in lifetime earnings.  相似文献   
23.
本文通过工程实例说明,提供了作者进行施工企业评估过程中对其对外承接项目评估的思路和方法.提出了施工企业对其在外所承接项目的权益是一种债权,同时明确了合理确定项目给企业所能带来的应收工程款以及取得应收工程款可能发生的风险是此类项目评估的核心.  相似文献   
24.
25.
中国古代的域外游记主要有佛教徒的求法记、使者的出使记、官员及其他人士的随征记、航海记等。现存者虽为数不多,但因保存了稀见地理风土资料、宗教资料和航海资料而具有极高的史料价值。  相似文献   
26.
美国的地理位置和历史文化决定了美国区域经济的发展严重不平衡.本文分析了美国政府对落后地区经济的财政调节措施,这对我国在市场经济条件下调节区域经济,推进西部大开发,一定具有深刻的启示.  相似文献   
27.
马克思关于“跨越资本主义制度卡夫丁峡谷”思想对东方落后国家在一定的社会历史条件下“跨越资本主义制度卡夫丁峡谷”而进入社会主义具有重要的理论指导意义。列宁把这个理论与俄国具体实际相结合使之俄国化;中共三代领导集体把这个理论与中国具体实际相结合使之中国化,并使“跨越资本主义制度卡夫丁峡谷”在中国由可能一步步走向现实。  相似文献   
28.
Exit Options in Corporate Finance: Liquidity versus Incentives   总被引:2,自引:0,他引:2  
This paper provides a first study of the optimal design of active monitors'exit options in a problem involving a demand for liquidity and costly monitoring of the issuer. Optimal incentives to monitor the issuer may involve restricting the monitor's right to sell her claims on the firm's cash-flow early. But the monitor will then require a liquidity premium for holding such an illiquid claim. In general, therefore, there will be a trade off between incentives and liquidity. The paper highlights a fundamental complementarity between speculative monitoring in financial markets (which increases the informativeness of prices) and active monitoring inside the firm: in financial markets where price discovery is better and securities prices reflect the fundamentals of the issuer better, the incentive cost of greater liquidity may be smaller and active monitoring incentives may be preserved. The paper spells out the conditions under which more or less liquidity is warranted and applies the analysis to shed light on common exit provisions in venture capital financing.  相似文献   
29.
30.
The question this paper investigates is whether or not different metropolitan areas each constitute a separate housing market or whether or not there is a single South African housing market. Theory on the Law of One Price suggests that if products or geographic areas belong in the same market, their absolute prices must converge, so that their relative prices are stationary. By using cross-sectional time series data of five metropolitan areas, the paper tests for the Law of One Price by applying the Im, Pesaran and Shin panel unit root test. The paper finds strong evidence of convergence in large middle-segment house prices and weaker support for convergence in medium middle-segment house prices. In addition, the paper finds no evidence for convergence in small middle-segment house prices. This suggests the existence of a national market for large and possibly middle-segment houses in metropolitan areas, but separate metropolitan markets for small middle-segment houses. In addition, the paper estimates the speed of convergence and finds that large middle-segment house prices converge within two to seven quarters, while the speed of convergence for medium middle-segment house prices in three of the five areas is five to eight quarters.  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