An extensive form interpretation of the private core

Summary. The private core of an economy with differential information, (Yannelis (1991)), is the set of all state-wise feasible and private information measurable allocations which cannot be dominated, in terms of ex ante expected utility functions, by state-wise feasible and private information measurable net trades of any coalition. It is coalitionally Bayesian incentive compatible and also takes into account the information superiority of an individual. We provide a noncooperative extensive form interpretation of the private core for three person games. We construct game trees which indicate the sequence of decisions and the information sets, and explain the rules for calculating ex ante expected payoffs. In the spirit of the Nash programme, the private core is thus shown to be supported by the perfect Bayesian equilibrium of a noncooperative game. The discussion contributes not only to the development of ideas but also to the understanding of the dynamics of how coalitionally incentive compatible contracts can be realized. Received: July 21, 2000; revised version: January 16, 2001     

浅谈观赏草在高尔夫球场的应用

观赏草品种多样,色彩丰富,适应性强。随着高尔夫运动在我国的迅速发展,人们对高尔夫球场的景观和竞技性的要求也不断提高。观赏草在高尔夫球场发球台周边、高草区、障碍区等合理运用能够增添球场色彩和丰富球场战略性。     

The risk to the public of tree fall

This paper is concerned with the quantification of tree risk to the British public as a whole; with factors which influence actual risk, such as location and meteorology; and with perceived risk which can be a driver of control actions. The emergent risk is found to be very small and the perceptual factors examined do not support anything other than a proportionate approach to safety management. Policy implications are discussed.     

“任务驱动教学法”在高职《园林树木》课程改革中的运用

《园林树木》课程是园林技术专业主干课程之一。文章针对于课程教学过程中存在的问题进行分析研究,提出了基于工作任务驱动法在教学中的实践,指出了课程改革思路,以学定教,突出能力培养,改革教学组织和采取的主要措施。     

长株潭一体化公路网构架优化的探讨

为加快长株潭一体化公路网的建设进程,降低公路网建设的成本,对长株潭一体化公路网结构进行了研究,将长株潭城市群十五大片区组团构成的公路网分布情况,抽象为一个赋权连通图,在此基础上应用Prim算法,得出了相应赋权连通图的最小支撑树,进而提出了长株潭一体化公路网构架建设的可行性方案,通过比较分析,说明了方案的有效性与合理性.     

On non-revealing rational expectations equilibrium

It is shown that a non-revealing rational expectations equilibrium may not be coalitionally Bayesian incentive compatible, may not be implementable as a perfect Bayesian equilibrium and may not belong to the weak fine core and thus may not be fully Pareto optimal. These negative results lead us to conclude the non-revealing rational expectations equilibrium is not a sensible solution concept. We wish to thank Dr A. Hadjiprocopis for his invaluable help with the implementation of Latex in a Unix environment. We also thank a referee for several, constructive suggestions.     

关于对商品林进行商品化经营的探讨

我国的森林分类经营将森林划分为生态公益林和商品林,但对于分类后的森林,特别是商品林的经营尚缺乏明确的理论指导。为此,提出了林木市场成熟理论,它是社会主义市场经济体制下关于商品林商品化经营的森林经营理论。其理论内核:一是以市场供求关系决定的市场价格来确定林木成熟龄;二是以市场需求来确定商品林经营规划。前者从时间上对林业生产进行布局,根据市场因素确定林木的成熟龄;后者从空间上对林业生产进行布局,并以市场成熟龄为基础。     

A simple American option pricing model

Binomial tree model was published in 1979, but it is impossible for hands to value American options with the model, and the result is imprecise. Using properties of continuous-time Martingale and Ito＇s theorem, the paper advances a concise model for valuing American option. The model is more simple and reliable than binomial tree model.     

破解中国三农问题与林草兴国

概略介绍了中国历朝历代草木殖成,国之富地的历史,当前要破解中国的三农问题,离不开草木殖成的现代科学发展观,其基本思路要认真解决几个难题:粮食安全问题;农产品基本供给问题;农村经济增长问题;农林牧三者之间的问题;生态文明建设问题。     

浅谈树种选择如何做到适地适树

本文介绍了适地适树的标准和含义,阐明了园林树木种植设计的科学性,分析了"适地适树"三条途径,强调了"适地适树"考虑因素。