全文获取类型
收费全文 | 7225篇 |
免费 | 225篇 |
国内免费 | 51篇 |
专业分类
财政金融 | 569篇 |
工业经济 | 190篇 |
计划管理 | 1493篇 |
经济学 | 938篇 |
综合类 | 2166篇 |
运输经济 | 38篇 |
旅游经济 | 129篇 |
贸易经济 | 745篇 |
农业经济 | 410篇 |
经济概况 | 822篇 |
信息产业经济 | 1篇 |
出版年
2024年 | 4篇 |
2023年 | 50篇 |
2022年 | 67篇 |
2021年 | 118篇 |
2020年 | 143篇 |
2019年 | 116篇 |
2018年 | 74篇 |
2017年 | 109篇 |
2016年 | 107篇 |
2015年 | 149篇 |
2014年 | 487篇 |
2013年 | 547篇 |
2012年 | 677篇 |
2011年 | 999篇 |
2010年 | 686篇 |
2009年 | 507篇 |
2008年 | 514篇 |
2007年 | 475篇 |
2006年 | 442篇 |
2005年 | 311篇 |
2004年 | 245篇 |
2003年 | 187篇 |
2002年 | 117篇 |
2001年 | 136篇 |
2000年 | 66篇 |
1999年 | 27篇 |
1998年 | 22篇 |
1997年 | 15篇 |
1996年 | 13篇 |
1995年 | 6篇 |
1994年 | 6篇 |
1993年 | 10篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 6篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1986年 | 1篇 |
1985年 | 13篇 |
1984年 | 20篇 |
1983年 | 10篇 |
1982年 | 2篇 |
1980年 | 5篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有7501条查询结果,搜索用时 156 毫秒
41.
Ruth Rodríguez‐Bermúdez Marta Miranda Inmaculada Orjales María Jos Ginzo‐Villamayor Wajih Al‐Soufi Marta Lpez‐Alonso 《International Journal of Consumer Studies》2020,44(3):206-219
Although the organic sector is still relatively small, the demand for organic food is increasing throughout the world. The characterization of consumers' perception of and attitudes towards organic food is important to enable the development of marketing policies aimed at attracting conventional consumers to the sector. Consumers' behaviour studies must be conducted specifically for different regions and countries as perceptions and attitudes vary across the world. In the present study, a questionnaire was designed for administration to consumers in Galicia (Northern Spain). The questionnaire was administered to 830 consumers in 200 establishments to obtain data about the consumers' perception of and attitudes towards organic food. The survey results showed that one‐third of responders consume organic food and that the typical profile of a consumer of organic food is a middle‐aged, medium‐high class, university‐educated female living in a large village, who shops in supermarkets and preferably consume vegetables, fruits and eggs. Most people who declared that they consume organic products confuse these with home and locally produced food, indicating the potential for growth of the organic sector by providing such consumers with appropriate information. Most consumers (including conventional consumers) have a good opinion of organic food and consider that it is better for health, is of better quality than conventional food and avoid pesticide residues. However, price continues to be a barrier to the consumption of organic produce. Most respondents stated that they would consume more organic food if the price was only between 10% and 30% higher than the conventional equivalent. Finally, organic consumers in Galicia showed positive attitudes towards using local breeds in organic agriculture, both for producing food and for ecotourism and educational activities. Such activities could contribute to conserving breed biodiversity and adding value to organic farming. 相似文献
42.
Payment for ecosystem services schemes (PES) are lauded as a market-based solution to curtail deforestation and restore degraded ecosystems. However, PES programs often fail to conserve sites under strong long-term deforestation pressures. Underperformance, in part, is likely due to adverse selection. Spatial adverse selection occurs when landowners are more likely to enroll parcels with low deforestation pressure than parcels with high deforestation pressure. Temporal adverse selection arises when parcels are enrolled for short time periods. In both cases, financial resources are allocated without having a sizeable impact on long-term land use change. Improving program performance to overcome these shortcomings requires understanding attributes of landowners and their parcels across large scales to identify spatial and temporal enrollment patterns that drive adverse selection. In this paper, we examine these patterns in Argentina’s PES program in Chaco forest, a global deforestation hotspot. Our study area covers 252,319 km2. Results from multinomial logistic regression models showed that large parcels of enrolled land and parcels owned by absentee landowners exhibit greater evidence of spatiotemporal adverse selection than smaller parcels or parcels owned by local landowners. Furthermore, parcels managed under land use plans for conservation and restoration are more likely to be associated with adverse selection than parcels managed for financial returns such as harvest of non-timber forest products, silviculture, and silvopasture. However, prior to recommending that PES programs focus on land uses with higher potential earnings, a greater understanding is needed of the degree to which these land uses meet ecological and biodiversity goals of PES programs. We suggest that increased spatial targeting of enrollment, along with enrollment of local landowners and further incentives for land uses that support conservation and restoration, could promote long-term conservation of forest lands. 相似文献
43.
Many developing countries face a major challenge today: how to safeguard the biodiversity maintained in the fields of the rural poor - which constitute a national and global public good - whilst meeting those same people's development needs and rights? A solution to this dilemma has thus been sought in adapting the design and implementation of Payments for Ecosystem Services (PES) concepts to the conservation of agrobiodiversity.Here we review the application of nine such Payments for Agrobiodiversity Conservation (PACS) schemes that have been applied to date in four Latin American countries over the period 2010–2018. These covered 130 threatened varieties across a number of major food crops, and involved over 100 farming communities and 1,100 farmers (45 % of which were women). Conservation service offers were received through a competitive tender mechanism. Average bid offers revealed high heterogeneity, varying between US$675/ha. to ten times as much.In relation to issues identified as key to PES, such as spatial targeting, differentiated payments and conditionality, the underlying design of the PACS schemes may be considered solid. PACS-related prioritisation processes allow for the a priori identification of sites with high ecosystem service densities and high threat levels. The use of competitive tenders permits accounting for cost heterogeneity in the provision of conservation services and for payments to be differentiated. Conditionality is strong.In terms of implementation, a “back of the envelope” calculation based on the results of the competitive tenders suggests that conservation costs are modest. For a priority conservation portfolio of 100 varieties (which may be from different crops) each with a target area of five hectares, costs would amount to just under US$860,000 over twenty years or US$70,000 p.a. at a 5 % discount rate. The small-scale and one-off nature of the interventions realised to date, along with threatened crop variety seed availability constraints, have however meant that environmental effectiveness has been incomplete in the short-term (area cultivated with specific threatened varieties increased, but still below the “not at risk” threshold). The establishment of systematic monitoring systems is required to determine longer-term impacts and inform more regular PACS interventions within a dynamically evolving systems context. 相似文献
44.
《Technovation》2020
While there is a prevailing rich body of studies on the role of university knowledge transfer office (KTO) in the commercialization process as part of the Third Mission, research on its role in community engagement activities is relatively neglected, even as funding agencies and policy makers conceive these as instrumental to sustaining social and economic development. This article focuses on the role of university KTO in supporting, facilitating or undertaking Third Mission community engagement activities. Drawing on data from the annual Higher Education Business and Community Interaction survey for the years 2007–2012, this paper empirically explores the relationship between a range of Third Mission activities by university KTO and performance of three key business-community services – provision of consultancy, provision of continuous professional development courses (CPD), and leasing of facilities and equipment (FE). It emerges that the routines of developing strategic plan and creating spin-off are positively associated with all types of community knowledge transfer (CKT) activities. Further, the routines of establishing partnerships with local and regional bodies, and licensing are positively related to CPD and FE, respectively. The article is concluded with implications for theory, practice, policy, and suggestions for future research. 相似文献
45.
本文利用2003—2016年中国278个城市的面板数据,基于地方政府竞争视角,探讨财政分权对城市创新水平的影响。结果表明:财政分权显著抑制城市创新水平的提升,且经过一系列稳健性检验后该结论依然成立;财政分权对城市创新水平的影响具有异质性,如在科教水平较低、级别较低及中小城市,财政分权显著抑制城市创新,而在科教水平较高、级别较高及大城市却并未抑制城市创新;财政分权通过促进地方政府“为增长而竞争”“为引资而竞争”、抑制地方政府“为创新而竞争”等途径对城市创新水平产生负向影响。研究结论为从政府财政体制改革视角促进城市创新提供启示。 相似文献
46.
贺文秀 《内蒙古财经学院学报(综合版)》2014,(1):117-119
互文性理论认为每个语篇都是对其他语篇的吸收和转化,语篇不是孤立的,总是存在于语篇网络中。互文性是西方结构主义和后现代主义文化思潮中产生的文本理论,但是目前对于互文性理论的研究多以文学批评理论的研究和文学作品研究为主,作为教学策略应用于英语教学的研究则为数不多。本文通过探讨互文性理论指导下大学英语写作教学的实践意义及目前大学英语写作教学存在的问题,提出了笔者在教学实践中所积累的几点写作教学法,以期为大学英语写作教学模式提供新的思路。 相似文献
47.
《Futures》2014
This paper explores an unusual community-supported agriculture pilot project in London, concentrating on the contribution of ICTs in its development and impact. The paper contextualises the project within wider waves of local food activism and reflects on the relevance of using ICTs to increase awareness and community participation in the production and consumption of locally-grown food. The results are also analysed in light of the author's parallel research on the use of ICT for agricultural development, or “e-agriculture”, in Kenya. The paper contributes to ongoing debates on ICTs and agricultural development, by highlighting community-building and the emergence of new voices and conversations as key roles played by ICTs, contributing to the development of more participatory, resilient and locally-centred food systems. The results of the pilot however also acknowledge the essential role played by activities in real life in building communal food growing practices, which can be enhanced but not substituted by online communities. 相似文献
48.
《Accounting Forum》2014,38(3):170-183
This study offers a unique interdisciplinary perspective on fair value accounting. The growing influence of esoteric financial instruments whose valuation is becoming increasingly complex makes it necessary to focus on actual valuation practices. Based on an extensive review, this paper regards fair value accounting for complex financial instruments as involving processes distributed among actors located inside and/or outside a reporting entity. It also draws attention to collaboration by organizations that apply their external and internal resources to perform complex financial valuations. Furthermore, it demonstrates that cases involving unusual market conditions underline the importance of human interactions to the valuation process. 相似文献
49.
林海 《世界标准化与质量管理》2014,(8):41-43
本文根据胶质含量测定试验方法的要求,以车用汽油中胶质含量(包括未洗胶质含量和溶剂洗胶质含量)测定为例,探讨了0.5单位数值修约、极限数值的表示和判定在胶质含量测定数据处理和结果判定中的应用。目的在于使车用汽油产品检测工作中在数据处理、报告和结果判定方面更加规范和统一。 相似文献
50.
近年来,高校学术不正之风十分严重,学术道德失范行为肆意蔓延,给刚刚步入学术之门的大学生带来了非常恶劣的影响,败坏了学风和校风。本文梳理了大学生学术道德失范行为现状及种种表现,分析了造成大学生道德失范的原因:急功近利的不良社会风气导致大学生学术研究的目的变异,高校学生学术道德监管机制尚不健全,学生自身学术道德修养不高。针对存在的问题,探寻有效措施,端正学风,提升学术主体的道德自律,遏制学生学术道德失范行为。 相似文献