排序方式: 共有49条查询结果,搜索用时 15 毫秒
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以增加农民收入从而支撑具有产业、区域特征的市场一体化为视角,对财政政策不同的支农方式和支农工具所产生的不同的农业市场一体化效应进行了分析,认为直接收入补贴明显好于价格支持;间接支农优于直接支农;而且不同的支农项目对市场一体化的促进作用差异显著。为此,提出了逐步减少价格支持,增加直接收入补贴,增加财政间接支农力度,引导农业生产要素多渠道利用,促进农业系统内外部合作,重视三农无形资产,建立适当监督机制等政策建议。 相似文献
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Trajectories in human domination of ecosystems: Human appropriation of net primary production in the Philippines during the 20th century 总被引:2,自引:0,他引:2
Thomas Kastner 《Ecological Economics》2009,69(2):260-269
The “human appropriation of net primary production” (HANPP) has been suggested as a comprehensive indicator to measure impacts of human land use on ecosystems. It accounts for (a) human-induced changes in biological productivity and (b) biomass harvest. This study presents an analysis of aboveground HANPP in the Philippines between 1910 and 2003, a period characterized by massive deforestation and increases in land use intensity and biomass extraction. Results show a steep increase of aboveground HANPP from just below 35% of potential productivity in 1910 to slightly above 60% in 1970 and constant values since then. Large-scale changes in land cover and agricultural practices were the main direct determinants of this trajectory in HANPP. Remarkably, HANPP grew at much slower pace than population did: While the amount of NPP appropriated by humans doubled throughout the period, population increased by a factor ten. Increasing efficiency in terms of biomass extraction per unit of area, relying on ever-increasing inputs, and changes in the nation's physical biomass trade balance were of major importance for this difference in growth rates. In the coming decades, the Philippines will have to face the challenge to meet increases in biomass demand without putting even higher strains on the ecosystems. 相似文献
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Christa Cuchiero Walter Schachermayer Ting‐Kam Leonard Wong 《Mathematical Finance》2019,29(3):773-803
Cover's celebrated theorem states that the long‐run yield of a properly chosen “universal” portfolio is almost as good as that of the best retrospectively chosen constant rebalanced portfolio. The “universality” refers to the fact that this result is model‐free, that is, not dependent on an underlying stochastic process. We extend Cover's theorem to the setting of stochastic portfolio theory: the market portfolio is taken as the numéraire, and the rebalancing rule need not be constant anymore but may depend on the current state of the stock market. By fixing a stochastic model of the stock market this model‐free result is complemented by a comparison with the numéraire portfolio. Roughly speaking, under appropriate assumptions the asymptotic growth rate coincides for the three approaches mentioned in the title of this paper. We present results in both discrete and continuous time. 相似文献
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裴永亮 《沈阳工程学院学报(社会科学版)》2009,5(1)
大多数作品在分析探春时都认为,庶出的探春"只拣高枝儿飞"和王夫人、王熙凤等当权派站在一起,背弃她的生母赵姨娘.但通过分析可以看出,探春与赵姨娘由于文化品味以及理想追求不同,决定了母女二人不可能有真正的理˙解和沟通.但是二人并没有抛开母女亲情.从探春三次流泪即可说明探春"只拣高枝儿飞"的观点是不正确的.<红楼梦>真正为我们展现的是探春与赵姨娘之间的本质差异,及她们之间扯不断的母女亲情与矛盾冲突. 相似文献
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在我国上市公司“既分又配”的现象普遍存在,这种有悖于一般财务政策的行为为什么会存在呢?国内的学者很少进行研究,本文就在已经分红的基础上从影响“既分又配”股利政策的因素人手,通过实证分析,发现仅有资产规模、净资产盈利率、股市行情等对“既分又配”有明显的影响,而且影响的方向与我们预期的相同。但是,企业的成长能力、股权自由流量的影响并没有得到实证分析的证明,有待于进一步研究。 相似文献
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许经勇 《广西经济管理干部学院学报》2006,18(3):32-34,61
只有逐步改变传统农村和农村经济所固有的特征,不断调整历史上形成的城乡经济社会分割格局,才有可能从根本上克服作为各自独立的城市系统与农村系统所必然产生的一系列矛盾,并为整个经济社会系统的协调发展开辟广阔的前景。城乡一体化是建设社会主义新农村的必由之路。城市化应当是推动农村发展的城市化,社会主义新农村应当是城市化进程中的新农村。 相似文献
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中国的家庭、家族是中国传统文化的基石.中国传统文化稳定的主要原因是以家庭的稳定维护社会的稳定;传统文化要随着社会的发展而发展;独生子女一代带来中国传统文化第二个百家争鸣的时代,并对中国传统文化产生巨大的影响. 相似文献
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节能减排和生态环境保护作为我国促进科学发展的重要抓手,既是我国应对国际金融危机,扩内需、保增长、调结构的重要内容,又是应对气候变化、增强国际竞争力的主要举措。对于我国公路建设行业来说,积极依靠科技创新,大力研发绿色建材,是节能减排的必由之路。 相似文献