全文获取类型
收费全文 | 21978篇 |
免费 | 464篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 4679篇 |
工业经济 | 1625篇 |
计划管理 | 3672篇 |
经济学 | 4821篇 |
综合类 | 274篇 |
运输经济 | 117篇 |
旅游经济 | 361篇 |
贸易经济 | 3437篇 |
农业经济 | 1088篇 |
经济概况 | 2291篇 |
邮电经济 | 78篇 |
出版年
2020年 | 261篇 |
2019年 | 335篇 |
2018年 | 386篇 |
2017年 | 442篇 |
2016年 | 413篇 |
2015年 | 295篇 |
2014年 | 441篇 |
2013年 | 2242篇 |
2012年 | 539篇 |
2011年 | 619篇 |
2010年 | 534篇 |
2009年 | 614篇 |
2008年 | 559篇 |
2007年 | 554篇 |
2006年 | 487篇 |
2005年 | 473篇 |
2004年 | 429篇 |
2003年 | 500篇 |
2002年 | 460篇 |
2001年 | 427篇 |
2000年 | 498篇 |
1999年 | 418篇 |
1998年 | 448篇 |
1997年 | 438篇 |
1996年 | 395篇 |
1995年 | 412篇 |
1994年 | 405篇 |
1993年 | 374篇 |
1992年 | 398篇 |
1991年 | 425篇 |
1990年 | 349篇 |
1989年 | 277篇 |
1988年 | 294篇 |
1987年 | 271篇 |
1986年 | 316篇 |
1985年 | 446篇 |
1984年 | 430篇 |
1983年 | 382篇 |
1982年 | 377篇 |
1981年 | 406篇 |
1980年 | 349篇 |
1979年 | 348篇 |
1978年 | 325篇 |
1977年 | 255篇 |
1976年 | 253篇 |
1975年 | 255篇 |
1974年 | 202篇 |
1973年 | 203篇 |
1972年 | 143篇 |
1971年 | 123篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
James H. Stock 《Oxford bulletin of economics and statistics》1996,58(4):685-701
This paper focuses on the construction of forecasts over long horizons where a typical long-horizon forecast might span four years using 20 to 40 years’ data. It is argued that the presence of persistence in the form of unit or near-unit autoregressive roots poses substantial difficulties for long-horizon interval and point forecasting. These difficulties may not be overcome even by efficient pre-testing or model-selection procedures and might, in general, lead to point forecasts with large asymptotic root mean squared errors and undesirably wide prediction intervals. 相似文献
22.
23.
Robert R. Grauer 《The Financial Review》1991,26(4):569-585
This paper employs the optimality conditions for expected utility and mean-variance portfolio problems to examine the ambiguities associated with the security market line criterion both at a point in time and through time. At a point in time, we show that the security market line criterion can be irrelevant, even in meanvariance economies. In a multiperiod setting, we show that the analysis of performance based on portfolio choice is inconsistent with the analysis based on return generating models. Empirical work suggests that the inconsistency can lead to dramatically different estimates of a security's required return. 相似文献
24.
Whilst the local multiplier impacts of the annual operation of universities has been the subject of intensive research, the economic impacts of capital construction projects have been almost completely ignored. This paper presents the results of detailed analysis of capital projects at Lancaster University in 1993-The reasons for the radically different annual operation and construction multipliers estimated in the Lancaster study are examined. Despite the smaller size of construction multipliers it is argued that it is a serious mistake to estimate local construction multipliers by making simplifying assumptions on the size of the key parameters in the multiplier equations. 相似文献
25.
Carl R. Chen 《The Journal of Financial Research》2001,24(2):309-310
Emerging Financial Markets, by David O. Beim and Charles W. Calomiris. McGraw‐Hill/Irwin, 2001, 364 pages, price $75.00. 相似文献
26.
27.
28.
This article uses a nonparametric test based on the arc‐sine law (see, e.g., Feller, 1965 ), which involves comparing the theoretical distribution implied by an intraday random walk with the empirical frequency distribution of the daily high/low times, in order to address the question of whether the abandonment of pit trading has been associated with greater market efficiency. If market inefficiencies result from flaws in the market microstructure of pit trading, they ought to have been eliminated by the introduction of screen trading. If, on the other hand, the inefficiencies are a reflection of investor psychology, they are likely to have survived, unaffected by the changeover. We focus here on four cases. Both the FTSE‐100 and CAC‐40 index futures contracts were originally traded by open outcry and have moved over to electronic trading in recent years, so that we are able to compare pricing behavior before and after the changeover. The equivalent contracts in Germany and Korea, on the other hand, have been traded electronically ever since their inception. Our results overwhelmingly reject the random‐walk hypothesis both for open‐outcry and electronic‐trading data sets, suggesting there has been no increase in efficiency as a result of the introduction of screen trading. One possible explanation consistent with our results would be that the index futures market is characterized by intraday overreaction. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:337–357, 2004 相似文献
29.
The purpose of this study was to assess the basis behavior of the Live Cattle Futures contract at the Chicago Mercantile Exchange (CME) before and after the 1995 contract changes. Additionally, an alternative method of basis calculation utilizing weighted mean futures prices versus settlement futures prices was compared to determine which method provides a better representation of the basis level. Within a regression model with heteroskedascity error framework, we found that the level of nearby basis in the period after June 1995 has shifted lower and the average monthly open interest of net commercial long positions has substantially increased after the contract modifications. These empirical results are consistent with the notion that more long activity entered the market in response to the contract modifications. Additionally, an alternative (new) measure of basis calculation (cash price minus weighted mean futures price) produced similar results to two other commonly used measures. In conclusion, the 1995 contract changes have neither increased nor decreased the volatility of live cattle basis. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:557–590, 2004 相似文献
30.
This study examines how two dimensions of strategic orientation (customer and competitor orientation) influence logistics and market performance. Two capabilities, operational flexibility and collaboration, are studied. Data were collected from manufacturers working with third party logistics providers. The findings suggest that customer and competitor orientations have different influences upon performance when leveraged through the capabilities. Competitor orientation, while having a detrimental direct effect on logistics performance, appears to be the better strategic approach, when supported with operational flexibility since it results in enhanced logistics (efficiency) and market (effectiveness) performance. Customer orientation, on the other hand, greatly improves logistics performance, i.e., internal efficiency. 相似文献