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   139431篇
  免费   3238篇
  国内免费   1篇
财政金融   26177篇
工业经济   11662篇
计划管理   22308篇
经济学   30077篇
综合类   1493篇
运输经济   970篇
旅游经济   2502篇
贸易经济   23850篇
农业经济   6180篇
经济概况   17156篇
信息产业经济   7篇
邮电经济   288篇
  2021年   843篇
  2020年   1632篇
  2019年   2386篇
  2018年   2404篇
  2017年   2551篇
  2016年   2717篇
  2015年   2104篇
  2014年   3418篇
  2013年   15366篇
  2012年   4247篇
  2011年   4253篇
  2010年   3775篇
  2009年   4389篇
  2008年   4001篇
  2007年   3351篇
  2006年   3642篇
  2005年   3642篇
  2004年   3231篇
  2003年   2983篇
  2002年   2936篇
  2001年   2724篇
  2000年   2644篇
  1999年   2510篇
  1998年   2392篇
  1997年   2390篇
  1996年   2271篇
  1995年   2073篇
  1994年   2105篇
  1993年   2072篇
  1992年   2118篇
  1991年   2028篇
  1990年   1893篇
  1989年   1723篇
  1988年   1658篇
  1987年   1662篇
  1986年   1747篇
  1985年   2516篇
  1984年   2404篇
  1983年   2205篇
  1982年   2065篇
  1981年   1980篇
  1980年   1949篇
  1979年   1883篇
  1978年   1682篇
  1977年   1639篇
  1976年   1397篇
  1975年   1300篇
  1974年   1198篇
  1973年   1193篇
  1972年   906篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
This study examines the influence of day-of-the-week patterns in security returns on long-run IPO underperformance. Comparisons are made between the IPOs in Ritter's [20] database, and a constructed set of matching firms based on SIC code and size, using NYSE, AMEX, and NASDAQ securities. It is found that virtually all of the IPO underperformance occurs on Mondays and Tuesdays and that the degree of underperformance significantly differs from other days. Thus, a common explanation may exist for the general day-of-the-week pattern in security returns and IPO long-run underperformance.  相似文献   
93.
Previous tests for structural changes (slope changes) and shifts (intercept changes) in the Phillips curve and union wage determination specify the date of structural change a priori. This article tests for structural changes and shifts without specifying the change point ex ante . The results support the belief that structural changes occurred in the early 1980s. Contrary to some previous research, however, the results do not support a structural shift in the Phillips curve.  相似文献   
94.
95.
96.
97.
Market‐based integration is not appropriate to the joint development of the southern African region; the region's political, technical and institutional immaturity requires instead loose, function‐based economic cooperation. This will also facilitate intraregional trade. Subregions in the meantime could progress to higher levels of integration: international experience has shown that successful integration is most likely when it takes place on the basis of ‘regions within regions’. Cooperative development of the subcontinent is likely to be best achieved through the ‘concentric circles’ approach to regional cooperation, in which a revised Southern African Customs Union‐Common Monetary Area forms the highly integrated core of a loose, function‐based cooperative arrangement covering the whole of southern Africa.  相似文献   
98.
99.
In this paper the role of expenses in explaining closed-end fund discounts is re-examined. A present value model is developed to illustrate the relationship between expenses and discounts. Earlier studies find that discounts are not related to management fees. In this paper, using a larger sample over a longer and different period and a better specification of the expense variable consistent with the model developed, discounts are found to be significantly related to expenses. The relationship between expenses and discounts holds in the presence of other control variables.  相似文献   
100.
This paper applies principles of transition to land tenure and squatting in South Africa. Political transition in South Africa reassigned political property rights, which produced contestable, and rent‐seeking incentives for squatting as a means to privatize land and redistribute wealth. Government failure to establish and protect private property rights in a squatter camp resulted in common‐pool problems that resisted private and public resolution with consequent rent dissipation and social loss. In response to this retreat from duty, informal agents emerged to claim their own share of the prize. Without enforceable rules of capture, the growth of squatter camps in South Africa will continue. JEL classification: D7, H8, K1, K4, R1, R4.  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