全文获取类型
收费全文 | 27061篇 |
免费 | 609篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 5462篇 |
工业经济 | 2099篇 |
计划管理 | 4365篇 |
经济学 | 5959篇 |
综合类 | 355篇 |
运输经济 | 132篇 |
旅游经济 | 368篇 |
贸易经济 | 4120篇 |
农业经济 | 1429篇 |
经济概况 | 3291篇 |
信息产业经济 | 2篇 |
邮电经济 | 89篇 |
出版年
2020年 | 266篇 |
2019年 | 363篇 |
2018年 | 431篇 |
2017年 | 479篇 |
2016年 | 443篇 |
2015年 | 311篇 |
2014年 | 464篇 |
2013年 | 2465篇 |
2012年 | 632篇 |
2011年 | 693篇 |
2010年 | 617篇 |
2009年 | 727篇 |
2008年 | 657篇 |
2007年 | 619篇 |
2006年 | 580篇 |
2005年 | 572篇 |
2004年 | 498篇 |
2003年 | 579篇 |
2002年 | 493篇 |
2001年 | 539篇 |
2000年 | 575篇 |
1999年 | 500篇 |
1998年 | 510篇 |
1997年 | 521篇 |
1996年 | 544篇 |
1995年 | 514篇 |
1994年 | 516篇 |
1993年 | 462篇 |
1992年 | 511篇 |
1991年 | 536篇 |
1990年 | 448篇 |
1989年 | 362篇 |
1988年 | 385篇 |
1987年 | 331篇 |
1986年 | 409篇 |
1985年 | 569篇 |
1984年 | 551篇 |
1983年 | 509篇 |
1982年 | 496篇 |
1981年 | 535篇 |
1980年 | 459篇 |
1979年 | 467篇 |
1978年 | 419篇 |
1977年 | 324篇 |
1976年 | 307篇 |
1975年 | 315篇 |
1974年 | 254篇 |
1973年 | 252篇 |
1972年 | 205篇 |
1971年 | 187篇 |
排序方式: 共有10000条查询结果,搜索用时 937 毫秒
51.
52.
53.
Option-Implied Risk Aversion Estimates 总被引:4,自引:0,他引:4
Using a utility function to adjust the risk‐neutral PDF embedded in cross sections of options, we obtain measures of the risk aversion implied in option prices. Using FTSE 100 and S&P 500 options, and both power and exponential‐utility functions, we estimate the representative agent's relative risk aversion (RRA) at different horizons. The estimated coefficients of RRA are all reasonable. The RRA estimates are remarkably consistent across utility functions and across markets for given horizons. The degree of RRA declines broadly with the forecast horizon and is lower during periods of high market volatility. 相似文献
54.
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
55.
56.
57.
Drs. W. Th. Vogelaar 《De Economist》1948,96(1):681-692
Eindhoven, September 1948. 相似文献
58.
There are two variance components embedded in the returns constructed using high frequency asset prices: the time-varying variance of the unobservable efficient returns that would prevail in a frictionless economy and the variance of the equally unobservable microstructure noise. Using sample moments of high frequency return data recorded at different frequencies, we provide a simple and robust technique to identify both variance components. 相似文献
59.
W. Scott Bauman C. Mitchell Conover Don R. Cox 《The Journal of Financial Research》2002,25(2):169-186
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
60.