全文获取类型
收费全文 | 33492篇 |
免费 | 781篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 6040篇 |
工业经济 | 2447篇 |
计划管理 | 5625篇 |
经济学 | 7548篇 |
综合类 | 363篇 |
运输经济 | 205篇 |
旅游经济 | 534篇 |
贸易经济 | 5144篇 |
农业经济 | 1604篇 |
经济概况 | 4690篇 |
邮电经济 | 74篇 |
出版年
2021年 | 195篇 |
2020年 | 333篇 |
2019年 | 468篇 |
2018年 | 651篇 |
2017年 | 650篇 |
2016年 | 609篇 |
2015年 | 435篇 |
2014年 | 690篇 |
2013年 | 3231篇 |
2012年 | 918篇 |
2011年 | 1017篇 |
2010年 | 813篇 |
2009年 | 932篇 |
2008年 | 973篇 |
2007年 | 880篇 |
2006年 | 810篇 |
2005年 | 732篇 |
2004年 | 736篇 |
2003年 | 720篇 |
2002年 | 669篇 |
2001年 | 702篇 |
2000年 | 693篇 |
1999年 | 589篇 |
1998年 | 611篇 |
1997年 | 569篇 |
1996年 | 564篇 |
1995年 | 526篇 |
1994年 | 548篇 |
1993年 | 581篇 |
1992年 | 532篇 |
1991年 | 568篇 |
1990年 | 515篇 |
1989年 | 448篇 |
1988年 | 445篇 |
1987年 | 440篇 |
1986年 | 456篇 |
1985年 | 632篇 |
1984年 | 604篇 |
1983年 | 588篇 |
1982年 | 576篇 |
1981年 | 506篇 |
1980年 | 500篇 |
1979年 | 501篇 |
1978年 | 424篇 |
1977年 | 386篇 |
1976年 | 310篇 |
1975年 | 307篇 |
1974年 | 272篇 |
1973年 | 273篇 |
1972年 | 224篇 |
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
31.
32.
33.
34.
In this paper we will analyze the relationship between the value and duration moments of a cash flow and movements in the yield curve. We will show that for changes in the yield curve which can be related to tn , the 1st order changes in the net present value of a cash flow are linearly dependent on the n + lth duration moments, and that the 2nd order changes are dependent on the sum of duration moments of order 2 n + 1 and 2 n + 2. We will use this relationship to tilt tracking portfolios so as to protect them against specific changes in the yield curve. 相似文献
35.
36.
The introduction of traffic management schemes has been one response of the National Parks to the problem of ever-increasing car-borne visitors and the consequent damage caused to the rural environment. By reviewing these schemes and by determining and explaining attitudes towards one particular traffic management experiment, the paper aims to deduce lessons for future policy. The analysis, based on two visitor surveys, suggests that the likelihood of success is improved when schemes are integrated, containing both ‘carrot’ and ‘stick’ elements. Since public perceptions are also found to be pivotal to its success, appropriate marketing of a scheme is vital. The paper concludes, however, that to achieve the fundamental objective of greater accessibility with less mobility, a more wide-ranging marketing effort is required intended to engender a sea change in attitude towards both the car and public transport. 相似文献
37.
38.
David J. Evans 《Fiscal Studies》2005,26(2):197-224
In social project appraisal, the policy profile of both distributional welfare weights and the social discount rate has risen considerably in recent years. This fact has important implications for the allocation of funds to social projects and policies in countries, and in unions of countries such as the EU. A key component in the formulae for both welfare weights and the social discount rate is the elasticity of marginal utility of consumption, e. A critical review of existing evidence on e suggests that the UK Treasury's preferred value of unity is too low. New evidence presented in this paper, based on the structure of personal income tax rates, suggests that, on average, for developed countries e is close to 1.4. This particular approach to the estimation of e has previously been under‐utilised by researchers. 相似文献
39.
40.
This paper investigates India's exceptional development pattern, specifically the major importance of information technology services (ITS), and compares it with China's development pattern. Both countries want to develop capabilities for carrying out the innovation of technologies that compete at the state-of-the-art in the world market. The paper posits that technological/economic success in the contemporary world market requires the ability to innovate complex technologies and complex technology-related services. The share of trade represented by complex technologies is compared with the “high-tech” share. The trading patterns of the two countries are compared using United Nations data. Two case studies of Indian ITS companies are then compared with two case studies of Chinese manufacturing companies. Historical and cultural differences appear to explain some of the differences in the development patterns of the companies located in the two countries. 相似文献