全文获取类型
收费全文 | 12532篇 |
免费 | 254篇 |
专业分类
财政金融 | 2362篇 |
工业经济 | 1036篇 |
计划管理 | 1908篇 |
经济学 | 2672篇 |
综合类 | 187篇 |
运输经济 | 74篇 |
旅游经济 | 156篇 |
贸易经济 | 1869篇 |
农业经济 | 721篇 |
经济概况 | 1787篇 |
信息产业经济 | 2篇 |
邮电经济 | 12篇 |
出版年
2020年 | 111篇 |
2019年 | 146篇 |
2018年 | 194篇 |
2017年 | 188篇 |
2016年 | 175篇 |
2015年 | 126篇 |
2014年 | 174篇 |
2013年 | 1153篇 |
2012年 | 266篇 |
2011年 | 309篇 |
2010年 | 284篇 |
2009年 | 329篇 |
2008年 | 318篇 |
2007年 | 262篇 |
2006年 | 247篇 |
2005年 | 282篇 |
2004年 | 227篇 |
2003年 | 262篇 |
2002年 | 213篇 |
2001年 | 252篇 |
2000年 | 235篇 |
1999年 | 237篇 |
1998年 | 228篇 |
1997年 | 234篇 |
1996年 | 259篇 |
1995年 | 230篇 |
1994年 | 228篇 |
1993年 | 197篇 |
1992年 | 220篇 |
1991年 | 236篇 |
1990年 | 203篇 |
1989年 | 165篇 |
1988年 | 167篇 |
1987年 | 136篇 |
1986年 | 189篇 |
1985年 | 261篇 |
1984年 | 255篇 |
1983年 | 252篇 |
1982年 | 224篇 |
1981年 | 237篇 |
1980年 | 199篇 |
1979年 | 216篇 |
1978年 | 188篇 |
1977年 | 166篇 |
1976年 | 138篇 |
1975年 | 134篇 |
1974年 | 135篇 |
1973年 | 103篇 |
1972年 | 104篇 |
1971年 | 98篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Policy reform and productivity change in Chinese agriculture: A distance function approach 总被引:1,自引:0,他引:1
Agricultural policy reform has been an important source of change in the Chinese agricultural sector. The reforms led to productivity growth and helped China to pursue its self-sufficiency goal especially in the grain sector. In order to analyze whether observable productivity growth stems from technologically induced components or from the market induced parts, a multi-input–multi-output model is derived by using an econometric distance function framework. A decomposition allows to distinguish allocative effects, scale effects, technological change, and technical efficiency change. Data on farms in Zhejiang from 1986 to 2000 are used to analyze the impact of policy reform. 相似文献
63.
Elicitation using multiple price list formats 总被引:2,自引:0,他引:2
Steffen Andersen Glenn W. Harrison Morten Igel Lau E. Elisabet Rutström 《Experimental Economics》2006,9(4):383-405
We examine the properties of a popular method for eliciting choices and values from experimental subjects, the multiple price
list format. The main advantage of this format is that it is relatively transparent to subjects and provides simple incentives
for truthful revelation. The main disadvantages are that it only elicits interval responses, and could be susceptible to framing
effects. We consider extensions to address and evaluate these concerns. We conclude that although there are framing effects,
they can be controlled for with a design that allows for them. We also find that the elicitation of risk attitudes is sensitive
to procedures, subject pools, and the format of the multiple price list table, but that the qualitative findings that participants
are generally risk averse is robust. The elicitation of discount rates appear less sensitive to details of the experimental
design.
Electronic Supplementary Material Supplementary material is available in the online version of this article at
.
JEL Classification C9, D81, D91
An erratum to this article is available at . 相似文献
64.
Irving Fisher has been overlooked as an influence on William Vickrey's work on taxation and as a link between Edgeworth and
Vickrey. Vickrey was Fisher's last and greatest student. 相似文献
65.
Despite the importance of the London markets and the significance of the relationship for market makers, little published research is available on arbitrage between the FTSE‐100 Index futures and the FTSE‐100 European index options contracts. This study uses the put–call–futures parity condition to throw light on the relationship between options and futures written against the FTSE Index. The arbitrage methodology adopted in this study avoids many of the problems that have affected prior research on the relationship between options or futures prices and the underlying index. The problems that arise from nonsynchroneity between options and futures prices are reduced by the matching of options and futures prices within narrow time intervals with time‐stamped transaction data. This study allows for realistic trading and market‐impact costs. The feasibility of strategies such as execute‐and‐hold and early unwinding is examined with both ex‐post and ex‐ante simulation tests that take into consideration possible execution time lags for the arbitrage trade. This study reveals that the occurrence of matched put–call–futures trios exhibits a U‐shaped intraday pattern with a concentration at both open and close, although the magnitude of observed mispricings has no discernible intraday pattern. Ex‐post arbitrage profits for traders facing transaction costs are concentrated in at‐the‐money options. As in other major markets, despite important microstructure differences, opportunities are generally rapidly extinguished in less than 3 min. The results suggest that arbitrage opportunities for traders facing transaction costs are small in number and confirm the efficiency of trading on the London International Financial Futures and Options Exchange. © 2002 John Wiley & Sons, Inc. Jrl Fut Mark 22:31–58, 2002 相似文献
66.
67.
The theory articulated in this paper suggests that the desire to reduce demand and competitive uncertainty are two separate, important motives for alliance formation. Taking this as a starting point, we predict the configuration of horizontal alliances that we might expect to observe within an industry when firms experience these uncertainties to different degrees. An empirical test of this theory using data from the global auto industry yields results consistent with the view (1) that alliances are a device for reducing both the uncertainties that arise from unpredictable demand conditions and those that arise from competitive interdependence, and (2) that variation of demand uncertainty and competitive uncertainty across firms explains differentials in both the intensity and structure of their horizontal alliance activity. 相似文献
68.
I re-examine Mankiw-Weil's (MW) claim that house prices will fall 47% by 2007. MW argue that the arrival of the Baby Boom generation at adulthood drove up prices during the 1970s. When the beginnings of the Baby Bust generation matured in the 1980s, prices softened. When this generation arrives in earnest, prices will collapse. I make three points: (1) The regression upon which MW hang their prediction has an implausible -8.1% trend, which drives their prediction. (2) Demand directly influences the rental price; the asset price (MW's variable) is influenced by demand only indirectly. I re-run MW's regression, replacing the asset price with the rental price, and their prediction disappears. (3) Relying on data presented by MW, I show that housing consumption rose during the 1970s, after adjusting for income growth. Just when MW say the asset price of housing was rising, consumers behaved as if the price were falling. Consumers were right: The rental price fell by approximately 20% during the 1970s. 相似文献
69.
Wayne H. Howard Robert W. Blake Thomas O. Knight C. Richard Shumway Michael A. Tomaszewski 《Agricultural Economics》1992,7(1):77-90
A method of combining survey data and Dairy Herd Improvement Association (DHIA) records to achieve low cost farm trials is presented. Farm trials and surveys of current practices and production responses are useful to identify yield gaps between expectations predicted from experimental findings and actual field results. Different management schemes can be ranked using subjective probabilities and stochastic dominance to enhance successful implementation of research findings and to increase the feedback between researchers, extension workers, and producers. A survey of current masitis control practices and expected milk yield response is the example. Combining survey results with DHIA records allowed estimating the relationship between somatic cell counts (SCC) and milk yield. Eliciting beliefs about the relationship between SCC and milk yield showed that producers agreed with predictions from the statistical model. Subjective probabilities about SCC and mastitis control practices showed that our sample of experts and producers consistently ranked the different practices but extension agents had no consensus about the the most or least effective ones. 相似文献
70.
In this paper we compare alternative asymptotic approximations to the power of the likelihood ratio test used in covariance structure analysis for testing the fit of a model. Alternative expressions for the noncentrality parameter (ncp) lead to different approximations to the power function. It appears that for alternative covariance matrices close to the null hypothesis, the alternative ncp's lead to similar values, while for alternative covariance matrices far from Ho the different expressions for the ncp can conflict substantively. Monte Carlo evidence shows that the ncp proposed in Satorra and Saris (1985) gives the most accurate power approximations. 相似文献