消费者选择生鲜农产品零售终端的行为分析——基于消费者效用的理论解释

已有的实证研究显示,消费者选择超市和农贸市场这两个生鲜农产品零售终端的频率存在差异。许多学者分析了造成这一差异的影响因素。但消费者选择不同零售终端的频率安排决策是如何做出的,这种频率安排又说明了什么等问题仍需深入探讨。从消费者效用角度出发,对这一频率安排差异进行理论解释,得出消费者效用最大化的层次还有待提升的结论,并提出提升这一层次的措施。     

从酸刺村看宁夏南部山区非农产业发展问题

过剩劳动力沉积于农业和农村是造成我国农村长期贫困的根源。宁夏南部山区的西海固由于历史和环境的原因，当地的贫困问题更为突出，发展非农产业来转移农村过剩的劳动力是解决这类地区贫困问题的根本途径。本文通过对宁夏南部西吉县酸刺村的调查分析来论述宁夏南部山区的非农产业发展问题。     

加快开发南方草地资源,促进生态经济建设

我国南方草地资源丰富,发展草业潜力极大。本文就南方草地的现状、类型及发展草业的途径进行了探讨。     

天然林保护工程绩效评价:现状、问题与研究展望

天然林保护工程实施绩效评价是优化工程宏观决策机制的基础.本文回顾了公共财政支出项目绩效评价的理论基础,天然林保护工程绩效评价研究现状、评价实践,分析天然林保护工程绩效评价研究和实践过程中存在的主要问题,提出了天然林保护工程绩效评价进一步研究的重点以及需要解决的机制问题.     

互联网金融的信用风险评估与预警研究

随着互联网金融的蓬勃发展,用户对消费金融的需求也越来越丰富多样。满足用户的多样化需求与建立健全风险监管体系成为互联网金融发展的重中之重。如何实现数据驱动服务升级、技术辅助市场监管成为研究的热点问题。本文通过数据处理与特征工程实现用户认证信息、金融信息、行为信息的融合,利用深度森林算法建立模型进行信用风险评估。结果表明,该方法能有效挖掘数据潜在价值,提高信用风险评估与预警效果。最后,本文针对互联网金融的信用风险预警与市场监管提出了建议。     

民俗旅游与少数民族社会发展——以云南省为例

民俗旅游近年来的发展成就有目共睹,通过分析民俗旅游对少数民族社会产生的普通作用和特殊影响,提出了云南发展民俗旅游的政府主导策略、品牌策略、人才策略和可持续发展策略等四种策略.     

四维全球生产形态的国家竞争战略理论研究

本文在全球化的条件下,把霸权作为一个重要的系统变量引入国家竞争战略理论框架,在通过考察以美元霸权为基础的现实国际分工格局的变化以及对美国经济战略调整进行具体的历史分析基础上,构造了一个四维三极全球生产形态模型。这个模型可以恰当地描述创新型国家与追赶型国家相互之间的竞争行为,更深刻地刻画了国家竞争战略的本质特征。     

Valuing the non-timber forest products in the Mediterranean region

The potential of non-timber forest products (NTFPs) in the Mediterranean region as a source of livelihood and sustainable development has been widely recognized. Yet, surprisingly few efforts have been made to value them comprehensively. Valuation efforts usually focused on selected NTFPs traded on formal markets, at local level. This paper aims to provide comprehensive estimates of NTFPs benefits at national and regional level in the Mediterranean region. Six major groups of NTFPs are identified: firewood, cork, fodder, mushrooms, honey and other NTFPs. Valuation is based on a wide variety of techniques, drawing on official statistics, and supplemented by results of local surveys. It shows that at Mediterranean level, NTFPs provide annual benefits of about €39/ha of forests, accounting for about a fourth of the total economic value of forests estimated by this study. The average estimate for southern countries (€54/ha) is considerably higher than for northern (€41/ha) and eastern countries (€20/ha). The paper reveals the degree of importance of the main NTFPs benefits for the country groups and the region as a whole. It also discusses some reasons of concern when drawing policy tools for improving rural income and forest conservation in the Mediterranean.     

Machine learning for financial transaction classification across companies using character-level word embeddings of text fields

An important initial step in accounting is mapping financial transfers to the corresponding accounts. We devised machine-learning-based systems that automate this process. They use word embeddings with character-level features to process transaction texts. When considering 473 companies independently, our approach achieved an average top-1 accuracy of 80.50%, outperforming baselines that exclude the transaction texts or rely on a lexical bag-of-words text representation. We extended the approach to generalizes across companies and even across different corporate sectors. After standardization of the account structures and careful feature engineering, a single classifier trained on 44 companies from 28 sectors achieved a test accuracy of more than 80%. When trained on 43 companies and tested on the remaining one, the system achieved an average performance of 64.62%. This rate increased to nearly 70% when considering only the largest sector.     

北京市森林碳汇市场构建研究

为了积极推进中国的节能减排事业,使中国的经济发展模式向低碳模式转变,阐述了北京市建立森林碳汇市场的必要性和可行性,并进行了问卷调查,通过研究公众对碳汇市场的了解程度和需求程度,提出了构建北京市森林碳汇市场的相关建议。