全文获取类型
收费全文 | 4386篇 |
免费 | 140篇 |
专业分类
财政金融 | 808篇 |
工业经济 | 246篇 |
计划管理 | 718篇 |
经济学 | 959篇 |
综合类 | 43篇 |
运输经济 | 26篇 |
旅游经济 | 42篇 |
贸易经济 | 720篇 |
农业经济 | 201篇 |
经济概况 | 760篇 |
邮电经济 | 3篇 |
出版年
2023年 | 28篇 |
2021年 | 33篇 |
2020年 | 67篇 |
2019年 | 91篇 |
2018年 | 155篇 |
2017年 | 167篇 |
2016年 | 153篇 |
2015年 | 86篇 |
2014年 | 143篇 |
2013年 | 491篇 |
2012年 | 169篇 |
2011年 | 173篇 |
2010年 | 167篇 |
2009年 | 182篇 |
2008年 | 168篇 |
2007年 | 160篇 |
2006年 | 134篇 |
2005年 | 76篇 |
2004年 | 102篇 |
2003年 | 102篇 |
2002年 | 88篇 |
2001年 | 56篇 |
2000年 | 72篇 |
1999年 | 54篇 |
1998年 | 68篇 |
1997年 | 37篇 |
1996年 | 63篇 |
1995年 | 41篇 |
1994年 | 52篇 |
1993年 | 50篇 |
1992年 | 57篇 |
1991年 | 53篇 |
1990年 | 57篇 |
1989年 | 29篇 |
1988年 | 31篇 |
1987年 | 42篇 |
1986年 | 39篇 |
1985年 | 60篇 |
1984年 | 58篇 |
1983年 | 36篇 |
1982年 | 45篇 |
1981年 | 46篇 |
1980年 | 42篇 |
1979年 | 43篇 |
1978年 | 49篇 |
1977年 | 50篇 |
1976年 | 43篇 |
1975年 | 30篇 |
1974年 | 22篇 |
1969年 | 25篇 |
排序方式: 共有4526条查询结果,搜索用时 16 毫秒
171.
Ruta V. Kalnins 《Process Safety Progress》1987,6(1):6-10
In order to select routes that minimize risk, government officials need information about the material being transported and its sources and destinations, the risks involved, shipping patterns, and emergency response capabilities. 相似文献
172.
173.
174.
175.
Manuel F. Torres Armando J. Sousa Raquel T. Torres 《International Journal of Technology and Design Education》2018,28(2):573-591
Replanning is often used to optimize results of an activity in an ever changing world. To address the challenge of preparing future engineers for success, a special course was created for all engineering freshmen of the Faculty of Engineering of the University of Porto, in Portugal. Presented as a case study, this special course underwent a careful replanning as a result of several years of experience in teaching practice alongside with a theoretical deepening in pedagogical and technological issues, under the aegis of the action-research methodology. Within the context of the case study course, the mentioned replanning was also based on a theoretical approach that clearly identifies teaching–learning-assessment methodologies that promote regulation from those that foster emancipation, using a specific instrument: a taxonomy of educational processes. The replanning was designed to globally boost results regarding the educational aims of the course such as furthering freshmen’s integration into work environment and preparing them for success by fostering transversal skills (needed for study and work). Technology is seen as a mean of education enrichment as well as a productivity tool. The introduced innovations include fun-but-educational activities, several types of assessment over time and specific technological tools which were critical for the educational impact/achievement of this course. Success is demonstrated by encouraging feedback from the stakeholders, high students’ classifications and a steady reduction in retention. It is advocated that large portions of the reasoning behind the replanning can be extrapolated to other courses. 相似文献
176.
LOREN V. GEISTFELD 《The Journal of consumer affairs》1982,16(2):334-346
Using price data collected in Indianapolis and Lafayette, Indiana, rank order correlations between price and quality were computed. These were compared to correlations based on price data obtained from the publications of consumer product testing organizations. It was found that price-quality correlations based on the price data furnished by consumer product testing organizations may not reflect price-quality correlations for specific markets. A second finding of the study suggests the existence of variability across store types with respect to price-quality correlations. 相似文献
177.
V. Umashanker Trivedi Mohamed Shehata Bernadette Lynn 《Journal of Business Ethics》2003,47(3):175-197
This study used a laboratory experiment with monetary incentives to test the impact of three personal factors (moral reasoning, value orientation and risk preference), and three situational factors (the presence/absence of audits, tax inequity, and peer reporting behavior), while controlling for the impact of other demographic characteristics, on tax compliance. Analysis of Covariance (ANCOVA) reveals that all the main effects analyzed are statistically significant and robustly influence tax compliance behavior. These results highlight the importance of obtaining a proper understanding of these factors for developing effective policies for increasing the level of compliance, and indicate that standard enforcement polices based on punishment alone should be supplemented by an information system that would acquaint tax payers with the compliance level of other tax payers; reinforce the concept of fairness of the tax system among tax payers; and develop programs that enhance and appeal to a taxpayer's moral conscience and reinforce social cohesion. 相似文献
178.
In this article, the potential impacts of Bt eggplant technology in Indian agriculture are analyzed. Several proprietary Bt hybrids are likely to be commercialized in the near future. Based on field trial data, it is shown that the technology can significantly reduce insecticide applications and increase effective yields. Comprehensive farm-survey data are used to project farm-level effects and future adoption rates. Simulations show that the aggregate economic surplus gains of Bt hybrids could be around US$108 million per year. Consumers will capture a large share of these gains, but farmers and the innovating company will benefit too. As the company has also shared its technology with the public sector, Bt open-pollinated varieties might become available with a certain time lag. This would make the technology more accessible, especially for resource-poor farmers, entailing further improvements in welfare and distribution effects. The wider implications of the private–public technology transfer are discussed. Furthermore, the potential benefits for farmers' health resulting from reduced insecticide applications are examined, using an econometric model and a cost-of-illness approach. These benefits are worth an additional $3–4 million per year, yet they constitute only a small fraction of the technology's environmental and health externalities. More research is needed for comprehensive impact analysis. 相似文献
179.
Ilya V. Surkov Alfons G. J. M. Oude Lansink Olaf van Kooten Wopke van der Werf 《Agricultural Economics》2008,38(3):363-373
Growth and liberalization of world trade have increased the risks of introduction of quarantine plant pests into importing countries. Import inspection of incoming commodities is a major tool for prevention of pest introductions related to world trade, but inspection capacities are limited. This article develops a theoretical and an empirical model for the optimal allocation of inspection effort for phytosanitary inspection of imported commodities when the inspecting agency has a limited capacity. It is shown that the optimal allocation of inspection effort equalizes marginal costs of pest introduction across risky commodity pathways. The numerical illustration finds the optimal allocation of inspection effort of chrysanthemum cuttings imported in the Netherlands. The numerical results suggest that ceteris paribus , greater inspection effort should be allocated to pathways whose inspection yields a greater reduction in the expected costs of pest introduction. The numerical results also suggest that import inspection has a high marginal benefit. In particular, we found that each additional euro of the inspection capacity decreases the expected costs of pest introduction from 18 to 49 euros, depending on the initial inspection capacity. 相似文献
180.
Governments around the world are beginning to embrace a new form of environmental regulation – mandatory disclosure of information.
While information disclosure programs appear to have an impact on subsequent firm behavior – often resulting in lower levels
of pollution – little is known about the costs and benefits of these programs and whether or not they enhance social welfare.
This paper presents a simple bargaining model where mandatory information disclosure is used to overcome a lack of information
on the part of the public. We characterize the conditions under which information disclosure will lead to a reduction in emissions,
and ultimately, the conditions under which it will enhance social welfare. Several extensions of the model are briefly explored,
including the effect of two sources of pollution – only one of which is subject to information disclosure.
This paper was prepared while V. Santhakumar was a Visiting Scholar at the Vanderbilt Center for Environmental Management
Studies, Vanderbilt University. 相似文献