When natural resources run out,market knowledge steps in: Lessons on natural resource deployment from a longitudinal study in a resource-scarce region of Ethiopia

With the increasing scarcity of natural resources, the ability to maintain quality standards during resource-scarce times becomes more critical for business performance. Theories on managing resource scarcity cannot be easily tested in contexts where resources are still abundant. This study therefore turns to an emerging market context in which natural resource availability naturally varies strongly between seasons, namely, that of Ethiopian pastoralists who for many generations learned to adapt to natural resource scarcity. Central to our theory is the natural resource deployment capability, which is the ability of a business to make efficient and effective use of available resources to maintain business performance during resource-scarce times. Using three-wave longitudinal data from 120 pastoral family-based livestock businesses, the study shows that when resources are scarce or extremely scarce, market knowledge helps to better deploy the scarce natural resources, leading to higher product quality. The findings imply that businesses with a better understanding of markets have stronger natural resource deployment capability. The lesson for businesses that are confronted with approaching resource scarcity is therefore to strengthen their ability to deploy resources efficiently and effectively by strengthening their market knowledge in which such capability is rooted.     

幼儿教师心理健康研究现状及展望

教育大计,教师为本。有好的教师,才有好的教育。当前不断发生的幼儿教师"虐童"事件警示社会应该关注幼儿教师心理健康问题。本文总结近年来幼儿教师心理健康的有关研究并做出展望,希望能促进对这一群体的研究。     

Analysis of Visitor Decision Making System When Visiting Natural Recreation Sites by Multinomial Logit Model

Multinomial Logit Model has analyzed the relationship between the frequency of visits to recreation areas and the motivational factors affecting the visits. Kastro Environment Preserving Site that is located in the Black Sea coast of Marmara region in Turkey, has been chosen as the site for this study. Kastro bay is a natural park that is visited only for recreational visits. The study has been conducted on a photogenic study group due to the proximity factor of Kastro bay close to Istanbul. Kastro bay is a popular recreational park due to its characteristic advantages such as a 200 m wide and approximately 2.5 km long beach and with its high quality vegetation. The vegetation type includes ash tree, oak tree, black pine, sand lily etc. Kastro bay is also the site for the Mediterranean seals (Monachus-monachus) which are at the level of extinction. Approximately 50,000 visitors visit the region during the months of July and August. It has been concluded that there is high direct correlation between the frequency of visits and the motivational factors. It has been determined that the visits are mostly based on the sea and the ecological tourism.Jel: O13, Q20, Q26, Q51, Q56, Q57     

外墙外保温贴砖施工中应注意的几个问题

建筑外墙外保温技术已被广泛应用于建筑物的施工中,目前的外墙外保温施工一般是采用在建筑物外墙涂刷涂料的方式,但涂料外墙墙面容易陈旧,并出现裂纹。为了使建筑物外墙美观效果持久,一些业主要求在建筑物外墙外保温面进行贴砖。在外保温层面再进行贴砖装饰尚属新工艺,现将施工中需要注意的问题提出与大家探讨。     

Instrumental variable estimation based on grouped data

The paper considers the estimation of the coefficients of a single equation in the presence of dummy intruments. We derive pseudo ML and GMM estimators based on moment restrictions induced either by the structural form or by the reduced form of the model. The performance of the estimators is evaluated for the non-Gaussian case. We allow for heteroscedasticity. The asymptotic distributions are based on parameter sequences where the number of instruments increases at the same rate as the sample size. Relaxing the usual Gaussian assumption is shown to affect the normal asymptotic distributions. As a result also recently suggested new specification tests for the validity of instruments depend on Gaussianity. Monte Carlo simulations confirm the accuracy of the asymptotic approach.     

留守儿童心理问题的战略应对

留守儿童是我国近年来出现的一个热点和突出社会话题,其特定的身份及经历易产生消极的心理问题,已引起了很多心理学者的关注。积极心理学是20世纪在西方兴起的新的研究思潮,主张挖掘和培养人的积极心理品质,以应对生活的挑战和压力。本文基于积极心理学的相关研究成果,针对留守儿童的一些特定心理问题,提出了相应的干预措施,以期有助于留守儿童心理健康水平的提高。     

瑜伽对大学生影响的对比研究

通过文献资料法、调查法、试验法和数据统计法,对普通高校中瑜伽教学影响广大学生的身体形态、身体素质、身体机能和心理健康等等方面进行分析与研究,目的在于探索瑜伽课程在高校实践中的实际效果与影响,指导大学生科学地进行强身健体,并为瑜伽运动的进一步推广寻找理论与实践依据。     

海南岛自然生态系统服务价值评估

以卫星遥感影像为基础,运用"3S"技术,解译并统计了海南岛陆地自然生态系统的类型和面积,利用生态经济相关理论基础,评估计算出年海南岛陆地自然生态系统服务价值。结果表明,2008年海南岛自然生态系统服务价值约2198×108元,是当年全省GDP的1.5倍;森林生态系统的服务价值占四类生态系统(森林、草地、湿地和淡水)服务价值的81.77%,单位面积价值量达3260×104元/km2;自然生态系统在维持营养物质循环、水调节、大气调节等方面的间接使用价值约2076×108元,是直接使用价值的17.0倍。研究首次建立了针对海南岛陆地生态系统服务价值全面的评估体系,并在评估方法上择优、改进,对海南岛自然生态系统服务价值监测体系的构建及深入研究具有重要意义。     

政府卫生支出绩效评价研究——以北京市为例

公共支出的绩效评价日益成为世界各国公共财政管理的重要内容。近年来,随着医药卫生体制改革的深化,各级政府在医疗卫生领域中的主导地位逐渐明确,医疗卫生领域的政府投入也日渐增加。在此背景下,政府卫生投入的效率和效果就非常值得深入探讨和评估。本文初步设计了政府卫生支出绩效评价体系,通过模糊层次分析法计算指标权重,利用北京市的统计数据对政府卫生支出绩效评价进行了实证分析并得出了相关结论。