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   23736篇
  免费   542篇
  国内免费   1篇
财政金融   5037篇
工业经济   1831篇
计划管理   3931篇
经济学   5237篇
综合类   286篇
运输经济   158篇
旅游经济   391篇
贸易经济   4032篇
农业经济   1017篇
经济概况   2212篇
信息产业经济   4篇
邮电经济   143篇
  2021年   154篇
  2020年   275篇
  2019年   407篇
  2018年   458篇
  2017年   538篇
  2016年   476篇
  2015年   360篇
  2014年   574篇
  2013年   2334篇
  2012年   676篇
  2011年   753篇
  2010年   670篇
  2009年   773篇
  2008年   678篇
  2007年   644篇
  2006年   580篇
  2005年   591篇
  2004年   507篇
  2003年   562篇
  2002年   527篇
  2001年   487篇
  2000年   519篇
  1999年   458篇
  1998年   435篇
  1997年   455篇
  1996年   418篇
  1995年   409篇
  1994年   420篇
  1993年   394篇
  1992年   426篇
  1991年   430篇
  1990年   329篇
  1989年   282篇
  1988年   298篇
  1987年   275篇
  1986年   311篇
  1985年   449篇
  1984年   413篇
  1983年   362篇
  1982年   385篇
  1981年   385篇
  1980年   351篇
  1979年   341篇
  1978年   306篇
  1977年   242篇
  1976年   236篇
  1975年   210篇
  1974年   172篇
  1973年   183篇
  1972年   139篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
This paper develops and estimates models of family and sex-specific emigration, as well as the sex composition of this emigration, from 12 European source countries to the U.S. for the period 1870–1910. The models are based on the distinction between economic migrants (males, single females, and some married females) and tied or trailing migrants (females) and are estimated with panel data, including data that relate to the occupational/industrial structure of male and female economic activity in source countries. Hausman-Taylor instrumental variable estimates suggest that although both males and females responded to labor-market signals, males were more responsive than females to per capita GDP differences. Moreover, compared to the rest of Europe, Ireland, and Scandinavia were the sources of many young, single male, and female migrants, who responded strongly to gaps in economic opportunities. In fact, much of the European response to such gaps appears to be due to migrants from Ireland and Scandinavia. Females tended to originate in English-speaking countries and countries that were agriculturally oriented. Service and manufacturing jobs in source countries discouraged the migration of females relative to males. Males tended to follow recent migrants more than females, but females responded more to long-term influences as measured by stocks of migrants from their source countries who had previously settled in the U.S. Countries with high birth rates had relatively fewer female emigrants, whereas those with high rates of natural increase 20 years earlier experienced relatively more male emigration. Intact families, other family members (including family-strategy male migrants and trailing female migrants), and single males and females responded strongly to economic incentives, but the singles were most responsive followed by family-strategy males.  相似文献   
12.
Previous research finds that large companies previously judged to be excellent growth companies have subsequently been poor investments. We examine small companies selected by Business Week on the basis of multiple criteria used in annual articles featuring highly rated growth companies. We study the investment performance over the three years before eleven annual Business Week publications and the three years after publication. We find positive excess returns in the pre‐publication period, but negative excess returns in the post‐publication period. This reversal in investment performance appears to be due to a mean‐reversion tendency in operating performance, in which the earnings and the past rates of return on capital of such companies subsequently decrease significantly.  相似文献   
13.
[英国路透社3月20日]中信证券与贝尔斯登的合作计划已经搁浅,这可能是中国海外并购活动的最新一次失败案例。  相似文献   
14.
This article examines the economic outcome of 2006 and builds a forecast for 2007–2010. The medium-term development risks of the Russian economy are analyzed.  相似文献   
15.
16.
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   
17.
In this paper we offer a method for deciding how to aggregate a set of elementary industries. The method is then applied to the problem of estimating a wage equation that allows for industry-specific effects. Our method explicitly formalizes the trade-off between goodness-of-fit and parsimony implicit in an aggregation problem. By varying the parameter of the assumed loss function, one obtains a whole sequence of aggregation levels. Further, the resulting sequence is consistent; that is, groupings formed at one level of aggregation will never be undone when one aggregates further.  相似文献   
18.
19.
The influence of lagged adjustment and consumer spending on retail labour productivity is investigated. Both influences result in a procyclical productivity pattern.  相似文献   
20.
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