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   138893篇
  免费   3219篇
  国内免费   1篇
财政金融   26100篇
工业经济   11619篇
计划管理   22124篇
经济学   29975篇
综合类   1497篇
运输经济   958篇
旅游经济   2497篇
贸易经济   23739篇
农业经济   6158篇
经济概况   17181篇
信息产业经济   8篇
邮电经济   257篇
  2021年   838篇
  2020年   1634篇
  2019年   2406篇
  2018年   2440篇
  2017年   2591篇
  2016年   2755篇
  2015年   2107篇
  2014年   3426篇
  2013年   15353篇
  2012年   4278篇
  2011年   4271篇
  2010年   3787篇
  2009年   4395篇
  2008年   3994篇
  2007年   3330篇
  2006年   3609篇
  2005年   3595篇
  2004年   3156篇
  2003年   2924篇
  2002年   2862篇
  2001年   2715篇
  2000年   2618篇
  1999年   2503篇
  1998年   2378篇
  1997年   2413篇
  1996年   2282篇
  1995年   2073篇
  1994年   2057篇
  1993年   2031篇
  1992年   2092篇
  1991年   2021篇
  1990年   1886篇
  1989年   1709篇
  1988年   1642篇
  1987年   1648篇
  1986年   1730篇
  1985年   2498篇
  1984年   2384篇
  1983年   2178篇
  1982年   2039篇
  1981年   1962篇
  1980年   1929篇
  1979年   1866篇
  1978年   1651篇
  1977年   1629篇
  1976年   1395篇
  1975年   1283篇
  1974年   1192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 0 毫秒
101.
102.
Using a sample of Australian Multi-sector trusts we examine selectivity and market timing performance and extend the analysis to include the relatively new measure of volatility timing. This is of particular relevance to our data set, as high levels of volatility persistence are prevalent in Australia. In addition we consider the stability, asymmetry and seasonality of the various performance and risk measures. A survivorship adjustment procedure is also employed in order to assess the impact of survivorship on selectivity, market timing and volatility timing performance.  相似文献   
103.
104.
Over the last decade, an increasing percentage of the profits reported by U.S. corporations were earned by their foreign subsidiaries and retained outside the United States resulting in the deferral of income taxes. The American Jobs Creation Act of 2004 provided a temporary federal tax incentive to remit such earnings, which resulted in the repatriation of $140 billion by the 30 firms comprising the Dow Jones Industrial Average. An analysis of the financial reporting disclosures made by these firms reveals that a tax expense was not fully recognized on a substantial portion of the earnings until repatriation because of an exception for foreign reinvestments deemed to be essentially permanent in duration. The implications of the currently acceptable accounting for undistributed foreign earnings are discussed as well as recommendations to improve the relevancy and reliability of the disclosures required for this exception to comprehensive recognition of deferred taxes.  相似文献   
105.
We empirically investigate the interactions among hedging, financing, and investment decisions. We argue that the way in which hedging affects a firm's financing and investing decisions differs for firms with different growth opportunities. We find that high growth firms increase their investment, but not leverage, by hedging. However, we also find that firms with few investment opportunities use derivatives to increase their leverage.  相似文献   
106.
The current progress of electrification in Russia is clearly insufficient compared with G8 countries. At the same time, economy sectors have a high potential for energy saving. The electricity consumption of households depends on their cash income and the growth rate of electricity tariffs.  相似文献   
107.
108.
109.
If actively managed mutual funds suffer from diminishing returns to scale, funds should alter investment behavior as assets under management increase. Although asset growth has little effect on the behavior of the typical fund, we find that large funds and small‐cap funds diversify their portfolios in response to growth. Greater diversification, especially for small‐cap funds, is associated with better performance. Fund family growth is related to the introduction of new funds that hold different stocks from their existing siblings. Funds with many siblings diversify less rapidly as they grow, suggesting that the fund family may influence a fund's portfolio strategy.  相似文献   
110.
This paper examines the spatial patterns of unemployment in Chicago between 1980 and 1990. We study unemployment clustering with respect to different social and economic distance metrics that reflect the structure of agents' social networks. Specifically, we use physical distance, travel time, and differences in ethnic and occupational distribution between locations. Our goal is to determine whether our estimates of spatial dependence are consistent with models in which agents' employment status is affected by information exchanged locally within their social networks. We present non‐parametric estimates of correlation across Census tracts as a function of each distance metric as well as pairs of metrics, both for unemployment rate itself and after conditioning on a set of tract characteristics. Our results indicate that there is a strong positive and statistically significant degree of spatial dependence in the distribution of raw unemployment rates, for all our metrics. However, once we condition on a set of covariates, most of the spatial autocorrelation is eliminated, with the exception of physical and occupational distance. Racial and ethnic composition variables are the single most important factor in explaining the observed correlation patterns. Copyright © 2002 John Wiley & Sons, Ltd.  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