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   136241篇
  免费   3210篇
  国内免费   1篇
财政金融   25602篇
工业经济   11576篇
计划管理   21655篇
经济学   29005篇
综合类   1449篇
运输经济   965篇
旅游经济   2489篇
贸易经济   23475篇
农业经济   6082篇
经济概况   16906篇
信息产业经济   8篇
邮电经济   240篇
  2021年   829篇
  2020年   1627篇
  2019年   2384篇
  2018年   2344篇
  2017年   2502篇
  2016年   2694篇
  2015年   2092篇
  2014年   3403篇
  2013年   15309篇
  2012年   4199篇
  2011年   4144篇
  2010年   3689篇
  2009年   4294篇
  2008年   3866篇
  2007年   3225篇
  2006年   3558篇
  2005年   3530篇
  2004年   3116篇
  2003年   2871篇
  2002年   2847篇
  2001年   2608篇
  2000年   2558篇
  1999年   2450篇
  1998年   2323篇
  1997年   2346篇
  1996年   2185篇
  1995年   2001篇
  1994年   2012篇
  1993年   1983篇
  1992年   2040篇
  1991年   1944篇
  1990年   1815篇
  1989年   1674篇
  1988年   1615篇
  1987年   1613篇
  1986年   1694篇
  1985年   2443篇
  1984年   2318篇
  1983年   2134篇
  1982年   1978篇
  1981年   1903篇
  1980年   1869篇
  1979年   1815篇
  1978年   1628篇
  1977年   1619篇
  1976年   1384篇
  1975年   1270篇
  1974年   1188篇
  1973年   1185篇
  1972年   897篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
This paper analyses low income dynamics in Britain using the first four waves of the British Household Panel Survey. There is much low income turnover: although there is a small group of people who are persistently poor, more striking is the relatively large number of low income escapers and entrants from one year to the next. Simulations using estimated low income exit and re-entry rates demonstrate the importance of repeated low income spells for explaining a person's experience of low income over a given period. We also document the characteristics of low income stayers, escapers and entrants.  相似文献   
152.
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   
153.
In this article we compare three models of the stochastic behavior of commodity prices that take into account mean reversion, in terms of their ability to price existing futures contracts, and their implication with respect to the valuation of other financial and real assets. The first model is a simple one-factor model in which the logarithm of the spot price of the commodity is assumed to follow a mean reverting process. The second model takes into account a second stochastic factor, the convenience yield of the commodity, which is assumed to follow a mean reverting process. Finally, the third model also includes stochastic interest rates. The Kalman filter methodology is used to estimate the parameters of the three models for two commercial commodities, copper and oil, and one precious metal, gold. The analysis reveals strong mean reversion in the commercial commodity prices. Using the estimated parameters, we analyze the implications of the models for the term structure of futures prices and volatilities beyond the observed contracts, and for hedging contracts for future delivery. Finally, we analyze the implications of the models for capital budgeting decisions.  相似文献   
154.
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   
155.
156.
157.
158.
159.
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   
160.
The paper seeks to evaluate the evidence on the employment effectsof the collective working-time reductions in Europe over thepast 20 years. While theoretical analyses produce contradictoryassessments, most empirical studies show positive employmenteffects but take insufficient account of these conditions underwhich the reductions in working time were implemented. Theseconditions for the success of collective working-time reductionsinclude an active training policy designed to minimise skillshortages in the labour market, the modernisation of work organisation,wage increases in conjunction with productivity gains and amore equal income distribution.  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