On uniform convergence of undiscounted optimal programs in the Mitra–Wan forestry model: The strictly concave case

In this paper, we show that the 1986 Mitra–Wan result establishing asymptotic convergence of maximal programs to the unique golden-rule forest in the case of undiscounted, strictly concave felicity functions can be strengthened, in the same setting, to the  uniform  asymptotic convergence of  optimal  programs to the unique golden-rule forest. We work with a notationally reformulated version of the model that may have independent interest.     

中国省际劳均收入的收敛研究——基于核密度函数和Markov随机过程理论的分析

采用核密度函数和Markov随机过程理论研究了我国省区劳均收入分布的动态演变和发展趋势。研究发现,改革前我国省区劳均收入为多峰分布,其遍历分布为偏向低收入的双峰分布;改革后,劳均收入分布经历了从多峰到单峰再到双峰的演变过程,其遍历分布为偏向高收入的双峰分布。从长期发展趋势看,改革后我国多数地区将会收敛于高收入区间。     

论凸显文物的非物质文化属性提升博物馆的社会教育效能

文物是人类劳动、智慧和精神的结晶,是向社会公众进行爱国主义、革命传统和历史唯物主义教育的最直接的物证。文物包括物质和非物质两大属性,文物的价值和社会教育功能都是通过非物质文化属性来体现的。因而,要提升博物馆的社会教育效能就必须要充分凸显文物的非物质文化属性,利用文化部门的宣传教育优势,结合旅游业的宣传推广,植根学校和社会教育,才能达到提高公众文化素质的目的。     

浅析非谓语动词的教学难点

动名词、不定式、分词是非谓语动词的三种基本形式,它们在句中虽具有动词的特点,却不做谓语,不受＂人称＂和＂数＂的限制,发挥着谓语之外的其它语法功能,因此成为了许多初学者的学习难点。本文基于作者多年教学实践的总结和研究,对非谓语动词的用法进行了提炼,重点分析了非谓语动词的学习难点：非谓语动词的动词特性、非谓语动词的语法功能、非谓语动词的逻辑主语,旨在以此提高学习者的语法运用能力。     

翻译学视野下的英文广告功能释读

广告以推销商品为最终目的,其主要功能是提供信息、劝说人们行动。由于英汉语言的差异,译者可根据不同受众,采用较为灵活的翻译策略,以使广告译文的语言精练生动,富有吸引力,符合目标读者的经验和反应,达到有效传递信息、唤起读者感应和行动的目的。     

钢框架结构设计简介

阐述了钢框架结构的应用领域及优缺点,对钢框架的设计方法及设计过程做了简述,最后得出钢框架的设计心得。     

社会固定投资与居民福利量化关系模型分析

固定资本投资是流动资本投资的前提和基础，也是整个社会经济规模扩张与发展所必须依赖的重要物质基础。现期厂商的固定资本投资会直接导致本期总需求的增加，在保持总供求平衡的前提下，政府本期的调控货币投放规模将会相应减小，从而影响本期社会弱势居民的福利水平。     

工程项目成本的控制

在施工企业中,加强对工程成本管理,不断降低成本,具有十分重要的意义。施工项目的成本计划工作是一项非常重要的工作,本文从如何选定技术上可行、经济上合理的最优降低成本方案入手,通过成本计划,把目标成本层层分解,落实到施工过程的每个环节,有效地进行成本控制。     

Optimal Size in the Waste Collection Sector

The purpose of this study is to analyze the cost structure of a sample of Italian wastecollection firms in order to assess economies of scale and density and, therefore, definethe optimal size of the firms. A total and a variable translog cost function were estimated using panel data for a sample of 30 firms operating at the provincial level over the period 1991–1995.The empirical evidence suggests that franchised monopoly, rather than side-by-sidecompetition, is the most efficient form of production organization in the waste collection industry. Further, the majority of firms are not operating at optimal scale.     

How Do Investors' Expectations Drive Asset Prices?

Based on an extension of the process of investors' expectations to stochastic volatility we derive asset price processes in a general continuous time pricing kernel framework. Our analysis suggests that stochastic volatility of asset price processes results from the fact that investors do not know the risk of an asset and therefore the volatility of the process of their expectations is stochastic, too. Furthermore, our model is consistent with empirical studies reporting negative correlation between asset prices and their volatility as well as significant variations in the Sharpe ratio.