考虑技术和学习率因素下供应链生产跨国转移策略分析

国内企业为了巩固市场地位和规避市场风险,纷纷走出去在海外投资建厂,建立生产基地,谋求海外发展,以增强其核心竞争能力。在技术转移和学习率影响下,文章考虑生产地所在东道国的不确定性和生产不同技术层次产品的多样性,建立了供应链生产跨国转移的数学模型,给出了模型求解的算法,并对算例进行了分析。结果发现,技术转移率在(0.6,1)和学习率在(0.8,0.95)的区间时,对生产跨国转移最为适宜,并且发现在学习率、通货膨胀率和汇率三个影响因素对基于生产跨国转移的整个供应链利润的影响都是很明显的,其中汇率对利润最敏感,通货膨胀率次之,学习率敏感性最弱。     

《森林法》修改的若干问题思考

1998年《森林法》实施十几年之后,人们对于森林的功能定位、内涵界定都发生重大变化,林业的性质以及林业建设的任务迅速转型。现行《森林法》在林业经营机制、林业管理体制以及林业产权制度方面的规定已经对林业建设形成掣肘,迫切需要进行修订以适应新时期生态文明建设的需要。《森林法》需要在立法宗旨、法律性质、制度内容、行政管理和森林保护等方面做出方向性改变,并应当建立森林物权制度和生态公益林管理制度,改革商品林管理制度和盗伐滥伐的法律责任。     

县域经济增长中结构红利的测度及决定 ——基于中国1 820个县面板数据的实证分析

产业结构升级是经济增长的源泉之一。本文基于中国1 820个县的面板数据,采用Translog生产函数估计要素弹性,进而测度县域经济增长中的结构红利,同时构建空间误差计量模型对结构红利的影响因素进行检验。研究结果表明2002-2010年间,结构红利占县域GDP总值的444%,对县域GDP增长的贡献达到了2435%。劳均资本、劳均土地等变量对结构红利有显著影响,本文还发现,在东部、中部、西部三个地区,财政支出占GDP的比重对结构红利都有显著的负向影响。     

Wood Fuel or Carbon Sink? Aspects of Forestry in the Climate Question

This paper discusses and contrasts two mainroles of forestry in light of the debate on theglobal climate. As the main problem is relatedto the increases of the CO₂-concentrationin the atmosphere, forests may be viewed aspart of the alleviation of the problem throughtheir function as (i) a source of biomass forenergy production, which may replace fossilfuels and thus indirectly reduceCO₂-emissions, and as (ii) carbon storage,since a growing forest extracts atmosphericCO₂ and fixes it as carbon in biomass. Inthe Scandinavian forestry, logging residues areincreasingly being used for energy production.In this paper the value of forests as a sourceof bioenergy is added to the traditional timbervalue. Formulated as a joint production modelwithin the Faustmann framework, the effect ofthis addition on the optimal rotation length isdiscussed. Based on data for spruce, thedominant species in the Scandinavian forestry,it is demonstrated that the rotation length isshortened compared to the standard Faustmannmodel. Shorter rotation length implies lesscarbon storage. Therefore, in this modelwithout explicit regard to the social carbonstorage value of the forest, the gains in termsof the climate problem from utilisation offorest biomass for energy production are beingdiminished by the value of reduced carbonstorage. The carbon value of the forest is thenadded to complete the model, with the effect ofincreasing the rotation length, a result thatis well known in the literature. Finally, theempirical effects of the interaction of thesetwo climate-related value elements of theforest are discussed.     

湖南森林旅游开发与森林公园保护

“回归大自然,走进大森林”是当今世界旅游业的新时尚,也预示了湖南省未来森林旅游的良好前景,本文阐述了湖南省开展森林旅游的资源条件和森林公园的发展概况,探讨了森林公园旅游开发的指导思想、原则、目标、重点和对策,并针对森林公园在旅游开发过程中存在的问题,提出了保护的具体措施。     

社会主义分配制度的理论突破与创新:1978-2008

中国特色社会主义收入分配理论是马克思主义分配原理同中国实践与时代特征相结合的产物.改革开放以来.分配制度适时调整,分配理论取得重大突破和创新:从平均主义到部分先富,实现非平衡突破;从"效率优先、兼顾公平"到"初次分配和再分配都要处理好公平与效率的关系",确定新的分配原则;从单一"按劳分配"到"多种方式并存,按劳分配与按生产要素分配相结合",收入分配制度进一步完善.     

Amenity values of spatial configurations of forest landscapes over space and time in the Southern Appalachian Highlands

This research analyzes amenity values of spatial configurations of forest landscapes over space and time in the Southern Appalachian Highlands using geographically weighted regression (GWR) in a hedonic housing-price framework with a census-block group (CBG) dataset. Results show that housing-price response to mean forest-patch size and forest-patch density increased substantially between 1990 and 2000 in a few specific areas with economically significant amenity values. The spatial and temporal dynamics of the resulting amenity-value estimates are evaluated for potential use as site-selection indicators for implementation of forest conservation programs.     

Analyzing the global human appropriation of net primary production — processes, trajectories, implications. An introduction

Humanity's role in shaping patterns and processes in the terrestrial biosphere is large and growing. Most of the earth's fertile land is used more or less intensively by humans for resource extraction, production, transport, consumption and waste deposition or as living space. Biomass production on cropland, grazing areas and in managed forests dominates area requirements, but other processes such as soil degradation, human-induced fires and expansion of settlements and infrastructure play an increasingly important role as well. The growing human domination of terrestrial ecosystems contributes to biodiversity loss as well as to a reduced capability of ecosystems to deliver vital services such as buffering capacity, soil conservation or self-regulation. This special section is devoted to the presentation of recent research into the patterns, determinants and implications of the human appropriation of net primary production (HANPP), an integrated socio-ecological indicator of land use intensity. By measuring the combined effect of land conversion and biomass harvest on the availability of trophic energy (biomass) in ecosystems, HANPP explicitly links natural with socioeconomic processes and allows for integrated analyses of land systems. This introductory article explains the rationale that links current HANPP research to Ecological Economics and discusses issues of definition and methods shared by all articles included in the special section. Finally, it gives an overview of the individual papers, provides some general conclusions and presents an outlook for future research: a better understanding of long-term trajectories of HANPP, of the significance of trade patterns as well as of the future role of bioenergy are highlighted as important issues to be addressed in the coming years.     

Trajectories in human domination of ecosystems: Human appropriation of net primary production in the Philippines during the 20th century

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.     

海南中部山区森林生态系统服务功能价值评估

海南中部山区是全省生态功能的核心区,对维持全岛生态平衡与可持续发展起着十分重要的作用。本文依据2005年SPOT2、SPOT4遥感影像（10米分辨率）所提取的专题图层分析统计出中部山区森林生态系统类型和面积,提出了各类型生态系统服务功能评价指标沐系,分为提供产品、调节功能、文化功能和支持功能4种类型;并利用生态经济相关理论基础对备服务功能价值进行了初步评价．结果表明,海南中部山区森林生态系统8种类型9种服务功能总价值为1549．5×10^8元／a,其中调节功能达1472．8×10^8元,占总服务功能价值的90％以上。为进一步提高人们的生态环保意识和促进海南生态补偿机制的建立提供重要参考。