全文获取类型
收费全文 | 25384篇 |
免费 | 755篇 |
国内免费 | 373篇 |
专业分类
财政金融 | 1755篇 |
工业经济 | 1380篇 |
计划管理 | 6726篇 |
经济学 | 4401篇 |
综合类 | 2450篇 |
运输经济 | 425篇 |
旅游经济 | 808篇 |
贸易经济 | 3534篇 |
农业经济 | 2263篇 |
经济概况 | 2770篇 |
出版年
2024年 | 105篇 |
2023年 | 451篇 |
2022年 | 469篇 |
2021年 | 718篇 |
2020年 | 1002篇 |
2019年 | 754篇 |
2018年 | 683篇 |
2017年 | 907篇 |
2016年 | 795篇 |
2015年 | 855篇 |
2014年 | 1903篇 |
2013年 | 2447篇 |
2012年 | 2059篇 |
2011年 | 2437篇 |
2010年 | 1771篇 |
2009年 | 1521篇 |
2008年 | 1630篇 |
2007年 | 1459篇 |
2006年 | 1185篇 |
2005年 | 928篇 |
2004年 | 657篇 |
2003年 | 424篇 |
2002年 | 273篇 |
2001年 | 247篇 |
2000年 | 189篇 |
1999年 | 110篇 |
1998年 | 129篇 |
1997年 | 73篇 |
1996年 | 68篇 |
1995年 | 53篇 |
1994年 | 46篇 |
1993年 | 26篇 |
1992年 | 21篇 |
1991年 | 21篇 |
1990年 | 12篇 |
1989年 | 9篇 |
1988年 | 7篇 |
1987年 | 6篇 |
1986年 | 12篇 |
1985年 | 15篇 |
1984年 | 12篇 |
1983年 | 11篇 |
1982年 | 7篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
This paper synthesizes recent research and new empirical findings to build a more comprehensive understanding of developments in China’s dairy sector. China’s tremendous rise in dairy demand has been driven by several mutually reinforcing factors: including rapid income growth, promotion by the government and dairy industry, changes in urban lifestyles, and the development of new, more sophisticated marketing channels. Domestic milk output has grown to satisfy rising demand largely by increasing the dairy herd. Substantial increases in productivity have been achieved through technology adoption, but there is evidence that the torrid growth has created inefficiencies because adaptations to marketing rules, infrastructure, and institutions have not kept pace with the changing environment. These results suggest there is ample room for future growth in both domestic milk production and dairy demand, but multinational firms and imported products will likely play and increasing role as China’s dairy market continues to develop. 相似文献
33.
利用面板数据对中国东、中、西部的进口额和GDP增长关系进行的实证研究。在短期内,GDP增长对进口额影响最小是中部地区,在长期,西部GDP增长对进口额影响最大。中国经济增长对拉动世界经济增长起了十分重要的作用,中国经济增长减速也会影响全球经济。 相似文献
34.
GONG Yan-fen PING Yu-lan 《美中经济评论(英文版)》2008,7(5):59-64
This article classified gas exploration risk on the basis of the characteristics of oil-gas exploration investment projects, which are internal systems risk and external non-systemic risk. It described each classification specifically and introduced the basic principles and mathematical model of the multi-factor hierarchical fuzzy comprehensive judgment in detail, and then researched the conducts the risk of the gas exploration with examples. 相似文献
35.
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
36.
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
37.
Martin Wittenberg 《The South African journal of economics. Suid-afrikaanse tydskrif vir ekonomie》2006,74(4):766-768
The on‐line electronic documentation supplied with the 1994 October Household Survey by the South African Data Archive (SADA) appears to be incorrect. In particular, the electronic version of the questionnaire does not correspond to the hard copy in the possession of the author. The most serious error is that the race classification in the electronic copy is different from the classification on the hard copy. Researchers relying on the electronic copy will erroneously interchange the categories “Coloured”, “White” and “Black”. This could lead to seriously misleading analyses. The reason for this mistake can probably be attributed to a retyping of the questionnaire using the 1993 OHS as a template. 相似文献
38.
Web数据挖掘是当今世界上的热门研究领域,本文从Web数据挖掘的定义开始分析研究Web数据挖掘的难点、过程等相关技术,并计论其在电子商务领域中的相关应用。 相似文献
39.
What's So Special about China's Exports? A Comment 总被引:2,自引:0,他引:2
Masanaga Kumakura 《中国与世界经济(英文版)》2007,15(5):18-37
Dani Rodrik argues that China's exports are unusually sophisticated for a country at its income level. He also claims that China's export sophistication reflects the government's successful industrial policy and has been instrumental in the recent acceleration of its economic growth. Although Rodrik's interpretation of China's economic growth is broadly correct, the accuracy of his empirical analysis is questionable. This note identifies several problems regarding the “export sophistication” index used in his empirical work and casts doubt on his analysis. 相似文献
40.