全文获取类型
收费全文 | 34769篇 |
免费 | 423篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 6464篇 |
工业经济 | 2077篇 |
计划管理 | 5508篇 |
经济学 | 7843篇 |
综合类 | 653篇 |
运输经济 | 123篇 |
旅游经济 | 483篇 |
贸易经济 | 7316篇 |
农业经济 | 845篇 |
经济概况 | 3202篇 |
信息产业经济 | 44篇 |
邮电经济 | 635篇 |
出版年
2021年 | 124篇 |
2020年 | 254篇 |
2019年 | 416篇 |
2018年 | 2650篇 |
2017年 | 2442篇 |
2016年 | 1573篇 |
2015年 | 364篇 |
2014年 | 505篇 |
2013年 | 1950篇 |
2012年 | 942篇 |
2011年 | 2399篇 |
2010年 | 2235篇 |
2009年 | 2006篇 |
2008年 | 1914篇 |
2007年 | 2249篇 |
2006年 | 459篇 |
2005年 | 739篇 |
2004年 | 787篇 |
2003年 | 911篇 |
2002年 | 589篇 |
2001年 | 403篇 |
2000年 | 431篇 |
1999年 | 332篇 |
1998年 | 344篇 |
1997年 | 339篇 |
1996年 | 338篇 |
1995年 | 313篇 |
1994年 | 325篇 |
1993年 | 310篇 |
1992年 | 340篇 |
1991年 | 357篇 |
1990年 | 280篇 |
1989年 | 224篇 |
1988年 | 247篇 |
1987年 | 223篇 |
1986年 | 267篇 |
1985年 | 356篇 |
1984年 | 340篇 |
1983年 | 300篇 |
1982年 | 310篇 |
1981年 | 333篇 |
1980年 | 285篇 |
1979年 | 288篇 |
1978年 | 255篇 |
1977年 | 188篇 |
1976年 | 188篇 |
1975年 | 196篇 |
1974年 | 143篇 |
1973年 | 166篇 |
1972年 | 122篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
This paper examines the influence of unemployment insurance (UI) on the length of nonemployment spells experienced by young workers. The analysis introduces a flexible duration model to estimate the effects of the weekly benefit amount and weeks of eligibility on the amount of time spent between jobs by men, distinguishing between the experiences of UI and non-UI recipients. The empirical findings suggest three conclusions: (1) UI recipients experience longer spells of nonemployment than their non-UI recipient counterparts, at least up to the point of exhaustion of UI benefits; (2) the level of the weekly benefit amount does not significantly affect the length of nonemployment spells; and (3) increasing the number of weeks of eligibility offered by a UI program leads to longer episodes of nonemployment. 相似文献
32.
33.
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
34.
In this paper we offer a method for deciding how to aggregate a set of elementary industries. The method is then applied to the problem of estimating a wage equation that allows for industry-specific effects. Our method explicitly formalizes the trade-off between goodness-of-fit and parsimony implicit in an aggregation problem. By varying the parameter of the assumed loss function, one obtains a whole sequence of aggregation levels. Further, the resulting sequence is consistent; that is, groupings formed at one level of aggregation will never be undone when one aggregates further. 相似文献
35.
Richard R. Mendenhall 《Journal of Accounting Research》2002,40(3):841-863
Recent studies suggest the apparent delay in the stock-price response to earnings announcements (i.e., post-earnings announcement drift) is caused by investors who underestimate the autocorrelation of seasonally-differenced earnings (persistence). I present results that suggest: (1) a firm's future persistence is predictable on the basis of its past persistence; (2) the immediate stock-price response to earnings is positively related to historical persistence; (3) post-earnings-announcement drift is independent of historical persistence; and (4) consistent with (2) and (3), the difference between a firm's current observed persistence and that implied in stock prices is independent of its historical persistence. These results extend prior research by demonstrating that investors are aware not only that seasonally-differenced earnings are autocorrelated, but that investors recognize firm-specific differences in the magnitude of the autocorrelation. 相似文献
36.
37.
Dieter Joachim Ziegenhagen 《保险科学杂志》2002,91(3):259-277
At present, our society and its social security system are not prepared to cope with the challenges resulting from the continuous increase of life expectancy. The traditional concept of disease has to be modified for serving the special needs of the elderly. The optimistic compression of disease theory is an intriguing model, but lacks prove by available data. The anti-aging boom diverts the focus from the social and financial burden that will be unevitably caused by long-term care in the future. If there will not be an — up to now unforeseeable — breakthrough in research, particularly dementia will have an enormous impact on social cost which is often underestimated. 相似文献
38.
Efficient Liability Rules: Complete Characterization 总被引:5,自引:0,他引:5
Received May, 18, 2000; revised version received March, 19, 2001 相似文献
39.
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
40.
C. A. Carter R. M. A. Loyns Z. F. Ahmadi-Esfahani 《Revue canadienne d'agroeconomie》1986,34(3):361-377
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
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