全文获取类型
收费全文 | 4848篇 |
免费 | 209篇 |
国内免费 | 47篇 |
专业分类
财政金融 | 354篇 |
工业经济 | 242篇 |
计划管理 | 780篇 |
经济学 | 1149篇 |
综合类 | 474篇 |
运输经济 | 89篇 |
旅游经济 | 210篇 |
贸易经济 | 472篇 |
农业经济 | 860篇 |
经济概况 | 473篇 |
信息产业经济 | 1篇 |
出版年
2024年 | 8篇 |
2023年 | 96篇 |
2022年 | 60篇 |
2021年 | 114篇 |
2020年 | 218篇 |
2019年 | 191篇 |
2018年 | 169篇 |
2017年 | 208篇 |
2016年 | 205篇 |
2015年 | 166篇 |
2014年 | 297篇 |
2013年 | 520篇 |
2012年 | 313篇 |
2011年 | 399篇 |
2010年 | 304篇 |
2009年 | 280篇 |
2008年 | 272篇 |
2007年 | 234篇 |
2006年 | 236篇 |
2005年 | 147篇 |
2004年 | 118篇 |
2003年 | 95篇 |
2002年 | 85篇 |
2001年 | 84篇 |
2000年 | 45篇 |
1999年 | 40篇 |
1998年 | 31篇 |
1997年 | 41篇 |
1996年 | 32篇 |
1995年 | 21篇 |
1994年 | 17篇 |
1993年 | 8篇 |
1992年 | 11篇 |
1991年 | 5篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1986年 | 2篇 |
1985年 | 7篇 |
1984年 | 9篇 |
1983年 | 8篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有5104条查询结果,搜索用时 62 毫秒
121.
Over the last two decades, extensive literature has examined the socioeconomic and environmental impacts of China's Sloping Land Conversion Program (SLCP), a program that was launched in late 1990s to mitigate the environmental effects of agricultural production and reduce rural poverty. However, little empirical evidence exists with regard to the impact of SLCP on rural households' sensitivity to nature-induced changes and environmental challenges. In this study, household-level data covering the period 1995–2010 from five Chinese provinces were used to examine the effect of SLCP on farmers' sensitivity to climate change. The empirical results show that participation in SLCP significantly reduced farmers' sensitivity to climate change by reducing their dependency on land and natural resources for income, and by diversifying their livelihood options. Spatially, the results reveal that the effect of SLCP on farmers' sensitivity vary across regions. Specifically, SLCP was found to have a ‘rate effect’ on farmers in the Northern regions and a ‘level effect’ on farmers in the Southern regions. Likewise, we found that the effect of SLCP differs considerably across income groups, with the effect on low- and middle-income groups being most significant. The results indicate that subsidy is the main pathway through which SLCP reduces farmers' sensitivity to climate change. In contrast, we found inclusive evidence about the indirect effect of SLCP farmers' sensitivity through the promotion of non-agricultural employment. These results carry major implications with regard to the effectiveness of ecological conservation programs and their mitigation potential through building farmers' resilience in China and ecologically fragile environments. 相似文献
122.
Human-driven land-use changes often cause a decline in biodiversity. Although traditional agricultural practices maintained biodiversity at high levels, recent land-use changes may have negative consequences on species composition. In this study, we examined the hypothesis that land consolidation, which is a major recent land-use change in agricultural areas, decreases plant species diversity over the long term (the so-called negative legacy). To test this hypothesis, we examined the relationships between consolidated areas and the occurrence of threatened plant species across Japan and at the prefecture scale. Twenty-three threatened plant species were selected, all of which were formerly common. Our results show that areas containing records of threatened plant species rarely experienced consolidation at whole-country and prefectural scales. Breakdown analysis showed that unconsolidated agricultural areas contained significantly more threatened species than consolidated agricultural areas. These results suggest that threatened plant species require unconsolidated agricultural areas (i.e., these species could not grow in consolidated areas). Thus, we propose that consolidation history could be used as an indicator of the potential for biodiversity recovery. We also suggest that consolidated agricultural areas should be used for food production rather than for the restoration of biodiversity, for reasons of cost efficiency. 相似文献
123.
North America has few cultural agricultural landscapes, and often commensurately poor governance arrangements for managing change in such settings. This research uses the Acadian dykelands of Nova Scotia, Canada, as an opportunity to explore the social and governance limits to coastal climate adaptation in ‘new world’ cultural agricultural landscapes, as well as inform local decision-making. Approximately half of Nova Scotia’s coastal wetlands were converted to dykeland in the 1600s, lowering local resilience to the increased frequency and storm severity anticipated with climate change. Today, dykelands protect a diversity of public and private interests, meanings and values, yet are controlled by the agricultural sector, which can no longer afford to maintain them all to 2050 climate projections. We report here on a representative online Q-methodology survey of 183 adult Nova Scotians in the spring of 2015. Respondents sorted 34 statements along a normal distribution about whether they prefer dykeland maintenance or wetland restoration, and under what governance arrangements. Four factors were derived: the dominant discourse was local, female and strongly pro-dykeland, indicating the likelihood for local resistance to dykeland removal on for cultural, recreational and farming reasons. The second factor was supportive of wetland restoration for reasons of efficiency, not wetland affinity, but characterized by those in positions of management power. The two minority viewpoints were less informed about dykelands, characteristic of outsiders, and concerned more with governance. More education is needed about the challenges facing dykelands, the benefits of coastal wetlands, and the management options, but this research shows proposals to change landscape should emphasize flood mitigation over cost-saving. Cultural values and status quo bias are clearly barriers to adaptation planning, even when discussing the removal of man-made structures. The factors were surprisingly polarized, suggesting the forced-normal distribution affects the space available to convey nuanced perspectives. Large p-set Q-method of this kind is likely most useful for characterizing the emergent discourses demographically, and understanding their prevalence; the same discourses had emerged within a much smaller pilot study. 相似文献
124.
The Coal Crisis in Appalachia: Agrarian Transformation,Commodity Frontiers and the Geographies of Capital 总被引:1,自引:0,他引:1 下载免费PDF全文
Benjamin J. Marley 《Journal of Agrarian Change》2016,16(2):225-254
Capital's commodity frontiers strategy has at once woven together regional differences within an expanding world‐system and remade the productive and reproductive activities of humans and the rest of nature. The development of successive commodity frontiers gave way to long waves of economic expansion that have been pivotal to accelerating accumulation and transcending capital's recurrent crises. In short, commodity frontiers are constitutive of world‐ecological moments premised on booms and crises of accumulation. In this paper, I examine the coal commodity frontier in Appalachia, to illustrate the region's history as one of succeeding frontiers in and out of the region over the long twentieth century of American capitalism. I argue that the origin of Appalachia's coal frontier was decisively made through the nineteenth‐century agricultural revolution expressed outside of the region. Appalachia's full‐fledged development was an outcome of capital's under‐reproduction strategies. The crisis of the region's frontier turned on a lack of surplus from under‐reproduction strategies, competing coal basins, economic diversification and competing energy sources. I find that the commodity frontier concept not only illuminates regional political economies and ecologies of difference, but also explains the production of nature of historical capitalism. 相似文献
125.
《Futures》2016
The recent turn in research, technology and innovation (RTI) policy towards challenge-led strategies is posing new demands to Foresight methodology. RTI Foresight practitioners need to complement their well developed set of technology oriented methods with equally sophisticated approaches tackling societal aspects of innovation. In this paper we aim to make a contribution to this requirement. Building on user innovation theory we argue that demand oriented RTI Foresight needs to systematically integrate voices and hypotheses from the fringes of the innovation system. In order to develop a sound approach for this we set out from well established Foresight theory on “weak signals” and “cognitive biases”. Adopting a constructivist stance towards such signals leads us to the need to set up a socially robust, diverse discourse on “seeds of change hypotheses”. We then outline a practical implementation of such a discourse in the context of the recent Foresight process of the Federal Ministry of Education and Research (BMBF) in Germany. We describe and discuss the experience of this Foresight process and suggest avenues for further development of the approach. 相似文献
126.
《Food Policy》2017
Structural changes in Norwegian and Danish food industry since the 1990s is analysed as a path dependent response to the neo-liberal turn. Norway entered the 1990s as a protected market and Denmark as case of an export oriented industry. These developmental strategies are rooted in early 20th century industrialisation and influenced by institutional transformations in the 1990s, such as EU and WTO. Mergers and acquisitions (M&A) are studied in the context of changing political environments. Explaining two different trajectories, we combine path dependency theories and a Polanyi inspired ‘varieties of capitalism’ framework with corporate strategy theories on food industry M&As. We identify two different types of path dependent development, a self-reinforcing in Denmark and a transformative ‘breaking point’ in Norway. 相似文献
127.
张金前 《国土与自然资源研究》2016,(4):1-5
以晋江市为研究区,依据2005年,2010年和2015年3期土地利用数据,从生态系统服务功能角度,运用Costanza的方法,结合谢高地修正的我国生态服务价值当量因子表,分析了晋江市土地利用变化与生态服务价值的响应关系。结果表明:2005-2015年,晋江市的城镇用地显著扩张,而耕地和林地却急剧减少,土地利用的生态系统服务价值总体呈逐年下降趋势。通过分析晋江市土地利用变化对生态服务价值的影响可以为科学合理利用土地,保障人口、资源、环境的可持续发展提供决策支持。敏感性分析表明,生态服务价值对生态服务价值系数的变化是缺乏弹性的,因此结果是可信的。在编制土地利用规划时应将生态服务价值考虑其中,尤其是应注重保护湿地、水域、林地等生态服务价值系数高的土地利用类型,以期实现晋江市的可持续发展。 相似文献
128.
M.J. KENELEY 《Annals of Public and Cooperative Economics》2014,85(3):409-425
The restructuring of the financial landscape that has occurred in the last three decades, has led to a reassessment of co‐operative models of organization. An outcome of this process has been the demutualization of mutual financial organizations. Using a case study approach this paper analyses the pressures on mutual structures encountered by Australian mutual life insurers. Such an approach provides a number of insights into the way in which firms adjust to changes in regulatory and competitive environments. It is concluded that a number of exogenous and endogenous forces combined to drive the process of organizational change. 相似文献
129.
新古典经济学在成本的论述上,并没有坚持机会成本观,与其“个人选择”的逻辑起点冲突。而主观主义经济学在成本观阐述上,坚持了“个人选择”。本文以主观主义经济学的思想为前提,采用逻辑演绎的方式系统论证了如下命题:(1)如果“机会成本”等同于效用,那么,非货币性收益是如何从证券定价函数中消失的?(2)记录企业过去行为结果的历史成本制度,在什么前提下,能够传递出对证券定价有用的信息?(3)固定成本和变动成本是否会导致个体决策上的差异?本文得到如下结论:(1)陌生人社会的崛起,委托人和代理人之间非货币性收益的不可转让性,导致对证券的定价,无需考虑非货币性收益;(2)在企业的最终产出受到人力资本异质性和外部资源冲击,而这两者无法直接定价时,记录企业过去一段时间的行为结果,将有助于间接预测不同证券持有的机会成本;(3)受制于要素交易契约形式的外生性和市场按类别交易,固定成本与变动成本将会带来不同的决策风险,进而需要对其做出区分。 相似文献
130.
解放后至改革开放的30年间,中国经济与工业建设蓬勃发展,诞生了众多优秀的民族品牌。本文结合具体时代背景、意识形态和大量经典案例.从品牌特征、现实作用以及图形美学三方面对该时期的国货品牌进行深入剖析,阐述了该时期国货品牌传统文化与现代特色相融合的独特魅力。 相似文献