全文获取类型
收费全文 | 1591篇 |
免费 | 91篇 |
专业分类
财政金融 | 47篇 |
工业经济 | 115篇 |
计划管理 | 136篇 |
经济学 | 241篇 |
综合类 | 14篇 |
运输经济 | 26篇 |
旅游经济 | 32篇 |
贸易经济 | 211篇 |
农业经济 | 237篇 |
经济概况 | 623篇 |
出版年
2024年 | 1篇 |
2023年 | 50篇 |
2022年 | 15篇 |
2021年 | 28篇 |
2020年 | 80篇 |
2019年 | 96篇 |
2018年 | 80篇 |
2017年 | 125篇 |
2016年 | 104篇 |
2015年 | 104篇 |
2014年 | 130篇 |
2013年 | 275篇 |
2012年 | 123篇 |
2011年 | 76篇 |
2010年 | 76篇 |
2009年 | 80篇 |
2008年 | 71篇 |
2007年 | 37篇 |
2006年 | 48篇 |
2005年 | 9篇 |
2004年 | 10篇 |
2003年 | 8篇 |
2002年 | 4篇 |
2001年 | 13篇 |
2000年 | 4篇 |
1999年 | 5篇 |
1998年 | 7篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1980年 | 2篇 |
排序方式: 共有1682条查询结果,搜索用时 15 毫秒
151.
Mulu Gebreeyesus 《Agricultural Economics》2015,46(Z1):139-155
Global trade in agriculture and food products is increasingly governed by an array of standards. In order to continue exporting, developing countries have little choice but to comply with the new requirements. This study uses a census based panel data set from the nascent floriculture industry in Ethiopia to empirically examine the determinants of firms’ adoption of international private standards in fresh horticulture produce in large‐scale estate farms. The econometric analysis shows that larger size, older, and foreign owned firms are more likely to adopt the private standards. Moreover, this study analyzes the overall industry level efforts and public–private partnership to launch and implement a national scheme GAP and build a firm's capacity to comply with the standards. 相似文献
152.
The Jóór (Dior) soils of Senegal's Peanut Basin are inherently low in organic matter, limiting yields of millet and other crops and threatening the food security of smallholders. Focus groups and interviews were conducted in eight villages to characterise the site-specific fertility management by farmers in the Peanut Basin. Results of the qualitative survey revealed that farmers base management decisions on a series of fertility indicators that include type, colour, and texture of soil, presence of vegetation, and productivity in previous years. In an effort to equalise fertility across the field, farmers amend areas they classify as less fertile with decomposed manure and household waste from the family sëntaare (traditional pile) orwith compost from managed piles. On-site measurements of soil in areas of fields amended with compost or sëntaare material revealed significant increases in peanut and millet growth over unamended areas, but little difference between the effects of compost and manure. Similarly, chemical analysis revealed increased effective cation exchange capacity (ECEC) and nutrient concentrations (K, Mg and Al) in soils amended with compost or manure. Similarities in the chemical characteristics of compost and sëntaare material suggest that development workers could emphasise improved pile management rather than promoting more labour-intensive composting. 相似文献
153.
The sub-Saharan Africa challenge programme is designed to address the problems of failures of agricultural markets, inappropriate policies and natural resource degradation, that contribute to the continuing deterioration of livelihoods and food security in the region. It is seeking to do this by redefining the roles of scientists and farmers through collaborative learning processes, addressing questions about the level, timing, type and formof participation, as well as themost effective approaches andmethods to foster them. The research domains of the programme deal with sustainable intensification of smallholder agriculture, the sustainable management of natural resources, the development of efficient markets, and the promotion of enabling policies. One question that was addressed in designing the initiative was deciding where to work so as to maximize the chances of successful testing of this new approach, so that it would lead to significant reductions of rural poverty. A participatory process was put in place to design a framework to accomplish this site selection, and then to apply it in west, east and southern Africa. A mixture of spatial data analysis and expert knowledge on spatial and non-spatial factors was used, and one primary site in each region was identified to form the basis for the next phase of the challenge programme. Several lessons were learnt from the process, including the importance of adapting themethods to actual conditions, the increased utility of targetting when the quantitative and the qualitative are freely combined, and the continued need for baseline spatial and non-spatial data to improve the targeting of research in the future that is designed to alleviate poverty in sub-Saharan Africa. 相似文献
154.
Stefania Lovo 《Agricultural Economics》2014,45(6):679-692
This article contributes to the debate on the role of land in reducing poverty in rural South Africa. It uses the year of arrival in the former homelands as an instrument for land access and size. This identification strategy is based on the fact that African households were forcibly relocated to the homelands during the apartheid. Due to increasing population pressure, later arrivals were less likely to be assigned land. The results show that land has a large positive effect on household welfare. Because the homelands are relatively disadvantaged areas, these results provide a lower bound for the positive effects of land on household welfare. 相似文献
155.
Constant D. Beugr 《International Journal of Human Resource Management》2013,24(7):1091-1104
The past decade has witnessed dramatic social and political changes on the African continent. The present article argues that these political and social changes may spill over in the workplace in the form of a quest for justice and empowerment. Based on the organizational justice literature, the article develops a conceptual framework that advocates the integration of justice concepts in managing African organizations. It also explains how African managers can anticipate this trend by developing and implementing fair organizational practices. 相似文献
156.
157.
158.
159.
160.
Food price variation is typical of the food economies of many low income countries. The presence or absence of road infrastructure is perceived to be one of the main determinants of this variation. This analysis shows that in the case of the former Zaire, food price dispersion is significant both across products and across regions. It is demonstrated that transportation costs explain most of the differences in food prices between producer regions and that road quality is an important factor in the transportation costs. However, food prices decrease relatively faster than transportation costs increase and traders' wages are higher on bad roads. 相似文献