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   137687篇
  免费   3225篇
  国内免费   1篇
财政金融   25821篇
工业经济   11586篇
计划管理   21869篇
经济学   29669篇
综合类   1468篇
运输经济   957篇
旅游经济   2491篇
贸易经济   23611篇
农业经济   6129篇
经济概况   17049篇
信息产业经济   8篇
邮电经济   255篇
  2021年   833篇
  2020年   1630篇
  2019年   2393篇
  2018年   2386篇
  2017年   2554篇
  2016年   2722篇
  2015年   2094篇
  2014年   3410篇
  2013年   15319篇
  2012年   4232篇
  2011年   4215篇
  2010年   3741篇
  2009年   4356篇
  2008年   3941篇
  2007年   3279篇
  2006年   3581篇
  2005年   3570篇
  2004年   3127篇
  2003年   2894篇
  2002年   2836篇
  2001年   2688篇
  2000年   2588篇
  1999年   2485篇
  1998年   2360篇
  1997年   2394篇
  1996年   2260篇
  1995年   2053篇
  1994年   2044篇
  1993年   2006篇
  1992年   2064篇
  1991年   1994篇
  1990年   1867篇
  1989年   1690篇
  1988年   1625篇
  1987年   1639篇
  1986年   1716篇
  1985年   2476篇
  1984年   2355篇
  1983年   2151篇
  1982年   2009篇
  1981年   1940篇
  1980年   1910篇
  1979年   1845篇
  1978年   1641篇
  1977年   1623篇
  1976年   1388篇
  1975年   1277篇
  1974年   1186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
161.
Recent studies examining the relationship between stock returns and exchange rate changes have provided evidence that the exchange rate exposure of non-financial companies is reduced by the use of foreign exchange derivatives. Building on such research, this study investigates whether past ineffective derivative hedging contributes to explaining future derivatives use. To the extent that companies monitor the effectiveness of their currency risk management practices, past ineffective hedgers can be expected to modify their future use of foreign exchange derivatives accordingly. In our study of 94 non-financial US multinationals, we provide evidence that the change in derivatives use from 1996–1998 to 1998–2000 can be explained in part by the ineffective hedging of currency risk in 1996–1998, controlling for variables associated with theories of optimal hedging. Additional analyses confirm that such primary results are robust to firm size, the level of foreign operations, and the use of derivatives to partially hedge currency risk. Our results imply that as exchange markets and risk management practices change, the use of derivatives to manage exchange rate risk also changes. Our contribution to this field of study is that we find evidence that past ineffective hedgers tend to increase their future use of FXDs.  相似文献   
162.
I examine the effect of employee equity‐based compensation (EBC) on firm performance and the determinants of EBC. Using two samples, I find that firms have come to rely more heavily on EBC than in the past. For both samples, I document a significant, positive relation between Tobin's q and the percentage of employee compensation that is equity based. For accounting returns, I find a positive relation with the earlier sample. However, for the later sample I find that greater use of EBC leads to lower levels of future accounting returns. I also find that the determinants of the proportion of EBC are different between the two samples.  相似文献   
163.
164.
Some 'real' problems of 'virtual' organisation   总被引:1,自引:0,他引:1  
This paper presents an ethnographic study of organisational change in a retail bank considering issues surrounding the supposed emergence of the 'virtual organisation'. It outlines emerging problems in organisational work as a consequence of the shift toward 'virtuality' and questions the explanatory value of such theoretical stances.  相似文献   
165.
166.
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   
167.
Canada's wheat grading system is largely based on visual criteria and it is based on relatively high quality standards. A strict varieties licensing system exists to maintain the integrity of the grade standards. One of the consequences of the licensing system is that higher yielding, lower or different quality wheats have not been grown in Canada until recently. The basic objective of this paper is to examine some of the consequences of the regulatory strategy of limiting wheat production to the traditional high quality wheats. This question is analyzed in the context of important changes in the international grain markets. Using a partial equilibrium trade model this paper estimates that if higher yielding wheats were permitted to be grown, annual producer gains would be 5 to 17 percent of current net farm income.
Le classement des blés au Canada est basé sur des critères visuels qui sont de hautes qualités. Le système actuel d'homologation des variétés est tel que l'intégrité de ce système est maintenue. En conséquent, ce système n'a pas encouragé la cultivation des blés de hauts rendements ou des varietés différentes que tout récemment. L'objectif principal de cette étude est d'examiner quelques unes des conséquences de la stratégic de la réglementation visant à limiter la production du blé aux variétés de hautes qualités. Cette question est adressée dans le contexte des changements importants qui ont eu lieu dans le marché international des grains. A l'aide d'un modèle d'équilibre partiel des échanges, la présente étude démontre gu'en permettant la production des blés de hauts rendements, le gain annuel aux producteurs serait de 5 à 17 pourcent du revenue agricole net.  相似文献   
168.
169.
北极冰川融化将使跨北极通航成为可能,运输公司可减少40%的航运距离。马六甲海峡也将不再垄断国际通运。国际经济将进一步融合。  相似文献   
170.
In the present paper, we model the policy stance of the People's Bank of China (PBC) as a latent variable, and the discrete changes in the reserve requirement ratio, policy interest rates, and the scale of open market operations are taken as signals of movement of this latent variable. We run a discrete choice regression that relates these observed indicators of policy stance to major trends of macroeconomic and financial developments, which are represented by common factors extracted from a large number of variables. The predicted value of the estimated model can then be interpreted as the implicit policy stance of the PBC. In a second step, we estimate how much of the variation in the PBC' s implicit stance can be explained by measures of its policy objectives on inflation, growth and financial stability. We find that deviations of CPI inflation from an implicit target and deviations of broad money growth from the announced targets, but not output gaps, figure significantly in the PBC's policy changes.  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