全文获取类型
收费全文 | 29478篇 |
免费 | 275篇 |
专业分类
财政金融 | 4950篇 |
工业经济 | 1686篇 |
计划管理 | 4695篇 |
经济学 | 6566篇 |
综合类 | 566篇 |
运输经济 | 71篇 |
旅游经济 | 210篇 |
贸易经济 | 6505篇 |
农业经济 | 591篇 |
经济概况 | 3258篇 |
信息产业经济 | 44篇 |
邮电经济 | 611篇 |
出版年
2020年 | 135篇 |
2019年 | 203篇 |
2018年 | 2484篇 |
2017年 | 2258篇 |
2016年 | 1455篇 |
2015年 | 294篇 |
2014年 | 387篇 |
2013年 | 1348篇 |
2012年 | 804篇 |
2011年 | 2264篇 |
2010年 | 2129篇 |
2009年 | 1836篇 |
2008年 | 1843篇 |
2007年 | 2110篇 |
2006年 | 346篇 |
2005年 | 622篇 |
2004年 | 652篇 |
2003年 | 770篇 |
2002年 | 472篇 |
2001年 | 281篇 |
2000年 | 281篇 |
1999年 | 250篇 |
1998年 | 247篇 |
1997年 | 204篇 |
1996年 | 215篇 |
1995年 | 192篇 |
1994年 | 185篇 |
1993年 | 215篇 |
1992年 | 198篇 |
1991年 | 201篇 |
1990年 | 163篇 |
1989年 | 178篇 |
1988年 | 152篇 |
1987年 | 145篇 |
1986年 | 156篇 |
1985年 | 260篇 |
1984年 | 252篇 |
1983年 | 224篇 |
1982年 | 204篇 |
1981年 | 197篇 |
1980年 | 208篇 |
1979年 | 200篇 |
1978年 | 162篇 |
1977年 | 183篇 |
1976年 | 149篇 |
1975年 | 140篇 |
1974年 | 129篇 |
1973年 | 132篇 |
1971年 | 96篇 |
1970年 | 97篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
Calvyn Potgieter 《International Journal of Technology and Design Education》2004,14(3):205-218
In this article the impact of technology education, as a new learning area (subject) in the curriculum, on in-service teacher
education in South Africa is described in order to ascertain the extent of the impact. The research on which this article
is based draws on a variety of experiences and observations in the field at grassroots level (in particular an outreach project
in rural communities). The envisaged impact of technology education on South African schools, communities, teacher educators
and teachers, the range of in-service teacher education that is required, and the impacts in urban and rural areas are discussed.
Finally a number of concluding remarks are made about the extent of the impact of the inclusion of technology education in
the new National Curriculum Statement and whether the situation has changed since the implementation of a pilot technology
education project in 1998.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
12.
13.
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
14.
The value of a technology strategy has been increasingly discussed by R&D personnel and those involved in product development and business planning efforts. In this issue Albert Rubenstein and Americo Albala elevate this discussion by showing the importance of preparing a firm to compete by stressing the development of important, relevant technologies. Discovery and development must be channeled into areas that will be needed to support business initiatives likely to occur in the future. Albala stresses the importance of this change for the development of economies in nations that have been disappointed by the lack of success of importing technologies from more developed nations, while Rubenstein maintains that the pace of marketplace change requires a technology strategy in order to reduce the misapplication of scarce resources within the firm and the possibility of being blindsided by competitive developments. These essays continue a year-long series of contributions that the editor-in-chief solicited from members of the editorial board. Members were asked to reflect upon changes and opportunities that they see influencing our profession during the coming decade. Both of these short essays are designed to introduce new perspectives. It is not essential that you agree with the recommendations, but we hope that you are stimulated as you reflect on the issues they raise. 相似文献
15.
16.
H.J Smoluk 《Review of Financial Economics》2004,13(3):211-229
This paper develops an international version of the consumption-based capital asset pricing (CCAPM), which we refer to as “catching up with the Americans.” Previous CCAPM research develops the concept of “catching up with the Joneses,” where a representative economic agent exhibits higher marginal utility of consumption as a result of higher past per capita consumption in his own country. Catching up with the Americans, on the other hand, is an international habit-preference hypothesis. It extends the idea of catching up with the Joneses by stating that consumers of non-U.S. countries gain higher marginal utility of consumption as a result of higher past American consumption growth. Contrary to much of the CCAPM literature, we test this version of the model using long bond rates rather than equity returns. However, like most of the previous research on the CCAPM, the catching up with the Americans model fails to explain the relationship between consumption and asset returns. 相似文献
17.
We propose a new model to estimate the term structure of interest rates using observed on‐the‐run Treasury yields. The new model is an improvement over models that require a priori knowledge of the shape of the yield curve to estimate the term structure. The general form of the model is an exponential function that depends on the estimation of four parameters fit by nonlinear least squares and has straightforward interpretations. In comparing the proposed model with current yield‐curve‐smoothing models, we find that, for the data used, the proposed model does best overall in terms of pricing accuracy both in sample and out of sample. JEL classification: E43, G12 相似文献
18.
Stephanie Stray 《Quality and Quantity》2009,43(1):161-171
That survey research is error prone is not a new idea and different varieties of non-sampling error have been investigated
in the literature as well as consideration being given in many statistics textbooks to the issue of sampling error. The paper
here considers research upon corporate environmental reporting. It compares information provided by corporate environmental
reports with information that survey respondents claim their organization’s environmental report contains. This enables the
accuracy of the claims to be assessed. Consideration is given to two different industries the Water industry and the Energy
industry. Errors due to inaccurate reporting by survey respondents are shown to be relatively infrequent and respondents appear
just about as likely to claim they report information that they do not, in fact, report as to fail to indicate that they report
information that is, in fact, actually reported. 相似文献
19.
20.