全文获取类型
收费全文 | 14890篇 |
免费 | 321篇 |
国内免费 | 30篇 |
专业分类
财政金融 | 2462篇 |
工业经济 | 1034篇 |
计划管理 | 2612篇 |
经济学 | 3124篇 |
综合类 | 423篇 |
运输经济 | 119篇 |
旅游经济 | 251篇 |
贸易经济 | 2183篇 |
农业经济 | 727篇 |
经济概况 | 2275篇 |
邮电经济 | 31篇 |
出版年
2021年 | 159篇 |
2020年 | 173篇 |
2019年 | 229篇 |
2018年 | 243篇 |
2017年 | 316篇 |
2016年 | 291篇 |
2015年 | 258篇 |
2014年 | 386篇 |
2013年 | 1362篇 |
2012年 | 584篇 |
2011年 | 639篇 |
2010年 | 560篇 |
2009年 | 506篇 |
2008年 | 544篇 |
2007年 | 456篇 |
2006年 | 433篇 |
2005年 | 386篇 |
2004年 | 250篇 |
2003年 | 259篇 |
2002年 | 246篇 |
2001年 | 231篇 |
2000年 | 234篇 |
1999年 | 252篇 |
1998年 | 220篇 |
1997年 | 201篇 |
1996年 | 194篇 |
1995年 | 180篇 |
1994年 | 180篇 |
1993年 | 209篇 |
1992年 | 192篇 |
1991年 | 192篇 |
1990年 | 161篇 |
1989年 | 171篇 |
1988年 | 154篇 |
1987年 | 141篇 |
1986年 | 139篇 |
1985年 | 248篇 |
1984年 | 237篇 |
1983年 | 216篇 |
1982年 | 198篇 |
1981年 | 190篇 |
1980年 | 202篇 |
1979年 | 196篇 |
1978年 | 160篇 |
1977年 | 176篇 |
1976年 | 144篇 |
1975年 | 134篇 |
1974年 | 126篇 |
1973年 | 130篇 |
1970年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 7 毫秒
991.
992.
The Economic Recovery Tax Act of 1981 significantly reduced the taxation of income-producing properties by accelerating tax depreciation on both new and, especially, existing properties. A partial reversal of the 1981 legislation appears likely. To provide some insight into the possible effects of a decrease in tax depreciation of income-producing properties, two potential tax changes are analyzed: an increase from fifteen to twenty years in the tax service lives of both new and existing properties and an increase for existing properties only. Both residential and commercial/industrial properties are considered. 相似文献
993.
994.
The purpose of this note is threefold. First, in addition to the well-known seasonal pattern to the eleventh-district cost-of-funds (COF), we document a twelve-month seasonal in the national median COF. Second, we demonstrate that the cause of seasonality in each of these COF series is due to the maladjustment of length-of-month effects. In particular, the eleventh-district COF is biased upwards in relatively short months while the national median is biased downward. Third, we show that the popular partial adjustment model for modeling the COF is misspecified. 相似文献
995.
Preston SH 《Medical economics》1999,76(19):75-6, 78, 80 passim
996.
997.
Socio-technical challenges in the development of digital multimedia broadcasting: A survey of Korean mobile television development 总被引:1,自引:0,他引:1
This paper examines the prospectus of Digital Multimedia Broadcasting from the technical, economic and regulatory issues. This paper attempts to gain a better understanding of how DMB will evolve and stabilize in next generation network environments. Two research questions guide this study: (1) How does DMB trigger a change in policy, market and industry structure? (2) What are the driving forces of the rapid DMB development in Korea? As these questions involve socio-technical issues, this study uses a socio-technical perspective to investigate the complex relations between the social and technical aspects of DMB by highlighting the co-evolving nature, diversity, and interface between different driving forces and policy. The finding is that Korean DMB is the outcome of a proactive strategy of a telecom carrier and the Korean government's industrial policy to support such strategy. Among the push-oriented trajectory, however, non-technical issues such as users, market and regulation are left behind, which reveals the disjunction of the DMB development in terms of the socio-technical system perspective. The development of DMB sheds light on the growing challenges in the dynamics of industry, regulation, and technology. 相似文献
998.
999.
随着经济全球化的不断推进,各国的保护措施从关税壁垒转向了非关税壁垒,面绿色贸易壁垒更是我国所遭遇的主要阻碍之一。因此,本文就绿色贸易壁垒的内涵和形式进行了认真研究,并分析其对我国外贸发展的不利影响,提出相应的对策建议。 相似文献
1000.