全文获取类型
收费全文 | 4876篇 |
免费 | 132篇 |
专业分类
财政金融 | 576篇 |
工业经济 | 266篇 |
计划管理 | 851篇 |
经济学 | 903篇 |
综合类 | 14篇 |
运输经济 | 36篇 |
旅游经济 | 42篇 |
贸易经济 | 733篇 |
农业经济 | 226篇 |
经济概况 | 1360篇 |
信息产业经济 | 1篇 |
出版年
2023年 | 43篇 |
2022年 | 32篇 |
2021年 | 42篇 |
2020年 | 73篇 |
2019年 | 133篇 |
2018年 | 159篇 |
2017年 | 147篇 |
2016年 | 112篇 |
2015年 | 99篇 |
2014年 | 176篇 |
2013年 | 435篇 |
2012年 | 178篇 |
2011年 | 209篇 |
2010年 | 177篇 |
2009年 | 158篇 |
2008年 | 164篇 |
2007年 | 145篇 |
2006年 | 147篇 |
2005年 | 137篇 |
2004年 | 134篇 |
2003年 | 112篇 |
2002年 | 108篇 |
2001年 | 72篇 |
2000年 | 71篇 |
1999年 | 69篇 |
1998年 | 71篇 |
1997年 | 60篇 |
1996年 | 59篇 |
1995年 | 57篇 |
1994年 | 35篇 |
1993年 | 58篇 |
1992年 | 50篇 |
1991年 | 41篇 |
1990年 | 41篇 |
1989年 | 45篇 |
1988年 | 44篇 |
1987年 | 31篇 |
1986年 | 30篇 |
1985年 | 53篇 |
1984年 | 50篇 |
1983年 | 36篇 |
1982年 | 33篇 |
1981年 | 30篇 |
1980年 | 17篇 |
1979年 | 15篇 |
1978年 | 13篇 |
1977年 | 17篇 |
1976年 | 16篇 |
1932年 | 12篇 |
1890年 | 17篇 |
排序方式: 共有5008条查询结果,搜索用时 0 毫秒
911.
912.
913.
With the sustainable development goals has come a renewed global interest in ending hunger and achieving food security, while preventing natural resource degradation. Despite this renewed interest and increased commitments to invest in agricultural development, there is an outstanding debate over the technological trajectories to sustainability. The debate centres on sustainable agricultural intensification (SAI) and agroecological intensification (AEI) pathways to agricultural sustainability. Using a systematic literature review approach, this study examines the debate over AEI and SAI. This study employs a theoretical framework based on the economic, social, and ecological dimensions of sustainable agriculture within a policy and institutional space. Based on the sustainability dimensions, a discourse analytical technique is applied to unravel the debate. The results reveal differences in actor composition in the SAI and AEI pathways. Both pathways aim to promote food security with optimal and sustainable use of inputs; however, the actors differ on discourse relating to the concept of farming, the role of genetic engineering, the scale of operation, land use and soil health. Resolving these differences requires a blended sustainability approach that moves beyond the current AEI and SAI debate by acknowledging the tradeoffs and synergies of the socio-economic and ecological dimensions. 相似文献
914.
P. N. Pali M. Schut P. Kibwika L. Wairegi M. Yami P. J. A. van Asten 《国际农业可持续发展杂志》2018,16(3):272-285
Agricultural policies in sub-Saharan Africa have paid insufficient attention to sustainable intensification. In Uganda, agricultural productivity has stagnated with aggregate increases in crop production being attributed to expansion of cultivated land area. To enhance sustainable crop intensification, the Ugandan Government collaborated with stakeholders to develop agricultural policies using an evidence-based approach. Previously, evidence-based decision-making tended to focus on the evidence base rather than evidence and its interactions within the broader policy context. We identify opportunities and pitfalls to strengthen science engagement in agricultural policy design by analysing the types of evidence required, and how it was shared and used during policy development. Qualitative tools captured stakeholders' perspectives of agricultural policies and their status in the policy cycle. Subsequent multi-level studies identified crop growth constraints and quantified yield gaps which were used to compute the economic analyses of policy options that subsequently contributed to sub-national program planning. The study identified a need to generate relevant evidence within a short time 'window' to influence policy design, power influence by different stakeholders and quality of stakeholder interaction. Opportunities for evidence integration surfaced at random phases of policy development due to researchers’ ’embededness’ within co-management and coordination structures. 相似文献
915.
916.
Jonathan Harwood 《国际农业可持续发展杂志》2019,17(4):312-325
The evidence on yields, food-production, food-calories per capita, and declining levels of malnutrition in countries experiencing a Green Revolution are commonly cited in support of the claim that the GR sought to maximise food production. If one looks closely at the actual design of GR programmes (in India and elsewhere), however, it is clear that they were instead intended to boost yields and profitability in a small number of targeted areas. The underlying rationale for targeting was that achieving very high yields in such regions would persuade farmers to abandon subsistence farming in favour of commercial production, relying upon the market for the purchase of inputs as well as the sale of produce. In response to widespread criticism of the Green Revolution ca. 1970 for neglecting the needs of peasant farmers (as well as accentuating rural unrest), the World Bank and other donors began to direct more attention and resources to smallholders, but the aim of commercialising farming remained unchanged. 相似文献
917.
The choice between self-employment and paidemployment is analyzed empirically using a so-called endogenous switching model. The model features beside the choice equation earnings, equations for self-employed individuals and employees and is estimated using a two stage structural probit method. The model is applied to a unique (Dutch) data set including childhood ability and family background variables. The main findings of the empirical analysis are that the probability of self-employment depends positively on the earnings differential between self- and paid-employment, that a relatively high score on a IQ test applied at the age of 12 increases the likelihood of becoming self-employed, and that the employment status of the father strongly influences the decision to become self-employed.The research reported in this paper is part of the project Economics of Political Decision Making of the University of Amsterdam. We acknowledge the financial support obtained from the Ministry of Economic Affairs by way of the Research Institute for Small and Medium-Sized Business and the financial support of the Netherlands Organization for Scientific Research. We are grateful to Joop Hartog for giving permission to use the data set used in this paper. Finally we thank Hessel Oosterbeek for stimulating discussions and Aad J. M. Kleijweg and Arthur Schram for some helpful comments. 相似文献
918.
Jonathan B. King 《Journal of Business Ethics》1989,8(1):39-50
While it is common to observe that our society and world are becoming increasingly complex and fast paced, most of our theories provide no bases upon which to develop appropriate strategies. The need for developing holistic strategies is becoming urgent in two related areas: major interactive technologies and morality.
Jonathan King is Associate Professor of Management at the College of Business at Oregon State University. He received his B.A. in philosophy from Antioch College (1965) and his M.B.A. in Finance (1975) and Ph.D. in Business, Government and Society (1980) from the University of Washington. His primary research interests are in the areas of moral philosophy and General Systems Theory. His most important publications are The Three Faces of Thinking, Journal of Higher Education (1986) and Prisoner's Paradoxes, Journal of Business Ethics (1988). 相似文献
919.
Improving the speed of adoption of agricultural technologies and farm performance through farmer groups: evidence from the Great Lakes region of Africa 下载免费PDF全文
John Herbert Ainembabazi Piet van Asten Bernard Vanlauwe Emily Ouma Guy Blomme Eliud Abucheli Birachi Paul Martin Dontsop Nguezet Djana Babatima Mignouna Victor M. Manyong 《Agricultural Economics》2017,48(2):241-259
The article examines the effect of membership in farmer groups (MFG) on adoption lag of agricultural technologies and farm performance in Burundi, the Democratic Republic of Congo and Rwanda. We use duration and stochastic production frontier models on farm household data. We find that the longer the duration of MFG, the shorter the adoption lag and much more so if combined with extension service delivery. Farmer groups function as an important mechanism for improving farm productivity through reduced technical inefficiency in input use. We discuss policy implications under which farmer groups are a useful channel to reduce adoption lag, and the means through which improved farm performance can be achieved. 相似文献
920.
This article researches how a corporate code of ethics (CCE) implemented in local government X has influenced the behavior of its employees, middle managers, and managers. Metaphors from the existing and desired CCE elicited by these three groups provided information on how to improve the effectiveness of the CCE. This method proved to be very fruitful. It appeared that continuous systematic attention needed to be paid to the CCE after the CCE had been implemented, particularly by management. Initiatives from management to start discussions about relevant questions of integrity appeared to be also necessary to make the topic a “normal” topic which employees were no longer afraid to discuss. In this way, the possibility could be created to develop collectively a “practical” frame of reference concerning relevant questions of integrity that would help employees to make decisions in difficult situations during their work in the future. 相似文献