全文获取类型
收费全文 | 16975篇 |
免费 | 371篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 2988篇 |
工业经济 | 1170篇 |
计划管理 | 2777篇 |
经济学 | 3655篇 |
综合类 | 156篇 |
运输经济 | 104篇 |
旅游经济 | 227篇 |
贸易经济 | 2626篇 |
农业经济 | 912篇 |
经济概况 | 2687篇 |
信息产业经济 | 1篇 |
邮电经济 | 44篇 |
出版年
2020年 | 172篇 |
2019年 | 275篇 |
2018年 | 375篇 |
2017年 | 362篇 |
2016年 | 353篇 |
2015年 | 213篇 |
2014年 | 374篇 |
2013年 | 1514篇 |
2012年 | 492篇 |
2011年 | 528篇 |
2010年 | 431篇 |
2009年 | 480篇 |
2008年 | 465篇 |
2007年 | 417篇 |
2006年 | 389篇 |
2005年 | 324篇 |
2004年 | 325篇 |
2003年 | 319篇 |
2002年 | 325篇 |
2001年 | 331篇 |
2000年 | 351篇 |
1999年 | 300篇 |
1998年 | 300篇 |
1997年 | 253篇 |
1996年 | 267篇 |
1995年 | 263篇 |
1994年 | 245篇 |
1993年 | 268篇 |
1992年 | 275篇 |
1991年 | 278篇 |
1990年 | 272篇 |
1989年 | 246篇 |
1988年 | 202篇 |
1987年 | 220篇 |
1986年 | 235篇 |
1985年 | 318篇 |
1984年 | 308篇 |
1983年 | 252篇 |
1982年 | 265篇 |
1981年 | 260篇 |
1980年 | 258篇 |
1979年 | 246篇 |
1978年 | 207篇 |
1977年 | 199篇 |
1976年 | 185篇 |
1975年 | 193篇 |
1974年 | 146篇 |
1973年 | 150篇 |
1972年 | 138篇 |
1971年 | 109篇 |
排序方式: 共有10000条查询结果,搜索用时 968 毫秒
121.
In order to explain cyclical behavior of factor demand, the static neoclassical model of the firm has been extended to include either adjustment costs (e.g. Lucas (1967)) or time-to-build considerations as in Kydland and Prescott (1982). This paper presents an intertemporal factor demand model which accounts for adjustment costs and gestation lags. The closed form solution of the model is a highly restricted vector ARMA-process that is estimated using quarterly data for the manufacturing industry in the U.S., 1960–1988. The main conclusion is that both sources of dynamics of factor demand are identifiable and found to be empirically of importance. 相似文献
122.
An Erratum for this article has been published in Journal of Applied Econometrics 18(2) 2003, 249 Previous empirical work on corporate growth rates using cross‐section or short‐panel econometric techniques suggests that growth rates are random but that some degree of mean reversion exists. This means that size differences between firms are transitory. Another, more natural way to explore the long‐run distribution of firm sizes is to examine data on the growth of particular firms over long periods of time. Using a sample of 147 UK firms observed continually for more than 30 years, our conclusions are that growth rates are highly variable over time and that differences in growth rates between firms do not persist for very long. Further, firms show no tendency to converge to either a common size or to a pattern of stable size differences over time. These results are compared and contrasted with standard approaches that suggest that firms reach and maintain stable positions in a skewed size distribution. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
123.
124.
125.
126.
127.
Christopher G. Leggett 《Environmental and Resource Economics》2002,23(3):343-355
This paper considers welfare analysis with therandom utility model (RUM) when perceptions ofenvironmental quality differ from objectivemeasures of environmental quality. Environmental quality is assumed to be anexperience good, so that while perceptions ofquality determine choices, ex postutility is determined by objective quality. Given this assumption, I derive a measure ofthe welfare impact of changes in environmentalquality, and I show how this new welfaremeasure differs from the traditional welfaremeasure developed by Hanemann (1982). This newwelfare measure provides an approach tomeasuring the value of information aboutenvironmental quality within the framework ofthe random utility model. 相似文献
128.
Bayesian MCMC Mapping of Quantitative Trait Loci in a Half-sib Design: a Graphical Model Perspective
N.A. Sheehan B. Gulbrandtsen M.S. Lund D.A. Sorensen 《Revue internationale de statistique》2002,70(2):241-267
Graphical models provide a powerful and flexible approach to the analysis of complex problems in genetics. While task-specific software may be extremely efficient for any particular analysis, it is often difficult to adapt to new computational challenges. By viewing these genetic applications in a more general framework, many problems can be handled by essentially the same software. This is advantageous in an area where fast methodological development is essential. Once a method has been fully developed and tested, problem-specific software may then be required. The aim of this paper is to illustrate the potential use of a graphical model approach to genetic analyses by taking a very simple and well-understood problem by way of example. 相似文献
129.
Competition in the long-distance market in the US continues to intensify; the 1996 Telecommunications Act has led to increased competition in long-distance telephony especially as the Regional Bell Operating Companies have begun to gain entry to long-haul, long-distance markets. In order to better understand the implications of having increased service offerings, models of how customers choose between carriers (and the impact of this choice on subsequent usage) will be useful. We develop the first publicly available models that simultaneously estimate choice and usage for intraLATA long-distance in the US. Utilizing a generalized Tobit model, the price responsiveness of usage and carrier choice are estimated. The results are generally consistent with expectations both in terms of theory and of practical experience in the industry. 相似文献
130.
Political entrepreneurship occurs when an individual acts on a political profit opportunity. These profit opportunities can be divided into two categories: productive, and predatory. Productive opportunities enable entrepreneurs to profit from enhancing the efficiency of government, while predatory opportunities enable entrepreneurs to profit from forcibly transferring resources from some to others. This analysis shows that political institutions tend to favor predatory over productive political entrepreneurship, and shows that what is sometimes referred to as political exchange does not have the same efficiency characteristics as voluntary exchange in private markets. 相似文献