用窒息价格辅助定价

本文重点阐述了在假定线性需求是合理的以及窒息价格的相关信息可用的情况下计算均衡价格的公式。它能够让分析人员信服,即使在数据非常有限以及缺乏数学支持的情况下,有效的基准计算也是可以实现的。此外,它还有助于阐明价格弹性与需求变化之间的变化趋势,     

民营担保企业运作现状及法律风险问题分析

本着为中小企业提供融资担保服务的宗旨,民营担保企业在致力于实现目标的同时,为解决就业问题、增加国家经济总值和增加税收贡献了不小的力量。由于法律风险防范意识上的不足,民营担保企业面临的法律风险逐渐暴露并呈现扩大趋势。如何能够有效预防法律风险,将其造成的种种损害降至最低,对于担保企业日后发展尤为关键。     

房地产抵押价值评估中被动高估风险的成因分析

2010年以来,中国人民银行和银监会多次提示各家商业银行关注资产泡沫上涨等原因造成的贷款系统性风险,一再收紧银根并加强对存量贷款的风险管理。本文剖析了房地产抵押贷款评估中三个关键概念的混淆,指出这是造成被动高估风险的主要成因。建议重新审视现有抵押评估技术准则,以非公开市场基准下的抵押价值代替市场价值,并更多地考虑成本法和收益法的应用,以防止上述风险在新增房地产抵押贷款中的产生和扩散。     

Estimating consumer willingness to pay for food quality with experimental auctions: the case of yellow versus fortified maize meal in Kenya

Biofortification of maize with provitamin A carotenoids is a new approach to the alleviation of vitamin A deficiencies in Africa. Unfortunately these varieties are yellow or orange, while consumers generally prefer white. Consumer willingness to pay for yellow and fortified maize was compared in experimental auctions in three regions in Kenya. The premium that consumers are willing pay for fortified maize (24%) was higher than the discount they require to buy yellow maize (11%), and in one zone consumers prefer yellow. Yellow color is, therefore, not an impossible obstacle for biofortified maize, although it would clearly be easier to introduce this maize first in regions where yellow maize is currently grown.     

Zur Qualität der Medienkontrolle: Ergebnisse einer Befragung deutscher Rundfunk- und Medienräte

This article presents the results of a survey among German media supervisors (members of supervising boards in public broadcasting stations and state media institutions). Given the increasing commercialization and internationalization of television, the supervising boards play a crucial part in assessing the quality of programs. From among 940 German supervisors, 364 took part in the survey, which covered the individual role conceptions of respondents as well as their attitudes towards quality criteria for television. Results suggest that both the supervisors’ amount of television use and the types of programs they prefer is clearly different from patterns in the population. This, along with the observation that supervisors often criticize what they saw privately, suggests (given the diversity of programs) that too much might be expected of them. Media supervisors do heed quality criteria in their work, but these probably do not correspond to other groups’ criteria, and especially not to the general population’s. To conclude, suggestions are discussed to improve the system of supervising programs by important social groups.     

Optimal Portfolios with Bounded Capital at Risk

We consider some continuous-time Markowitz type portfolio problems that consist of maximizing expected terminal wealth under the constraint of an upper bound for the capital at risk. In a Black–Scholes setting we obtain closed-form explicit solutions and compare their form and implications to those of the classical continuous-time mean-variance problem. We also consider more general price processes that allow for larger fluctuations in the returns.     

IMPERFECT INFORMATION AND THE CHOICE BETWEEN COLLUSION AND HORIZONTAL MERGER

If the payoff obtained by the parties of an agreement depends on the values set for variables the value of which cannot be described precisely or monitored accurately, then the first best outcome may not be achieved. It is shown here that in some cases a second best long term agreement gives the parties a higher payoff, in other cases a short term arrangement is preferred. The interpretation of this result given in the paper is that when a long term contract is preferable, then firms are unable to commit themselves to it through a collusive agreement, and they will try to merge. Vice versa, no need to integrate arises when the preferred second best agreement is the short term one. The last section provides an example, where advertisement effort is non-contractible, while prices are.     

西藏矿产资源及其可持续发展初探

根据西藏矿产资源丰富、地质环境复杂、生态环境脆弱、矿业开发蓬勃发展的现状,针对矿产资源在西藏区域经济发展中所处的地位以及西藏矿产资源开发中存在的对矿山地质环境和矿区生态环境造成不同程度的影响等问题,从推进西藏矿产资源可持续开发的角度出发,贯彻落实科学发展观,走可持续发展道路;科学规划矿业开发布局,合理有序地开发矿产资源;加大找矿力度,进一步摸清西藏矿产资源家底;坚持矿业开发与生态环境保护并重,建设绿色矿山;依靠科学技术,推动矿业健康有序发展。     

The estimation of agricultural policy effects on soil erosion—An application for the bio-economic model MODAM

As agricultural policies affect land use, they have effects on the amount of soil erosion in agricultural regions through changes of the economic conditions of agricultural production. Prices of inputs and outputs, regulations and incentives can change, forcing or encouraging farmers to adopt new crop rotations. This paper shows how a bio-economic model can be used to describe and estimate the effects of policies on agricultural production and the risk of soil erosion at the example of a region in North-Eastern Germany. The model uses both an assessment tool that is based on a fuzzy-logic approach for the estimation of soil erosion risk of cropping practices, and a linear programming model, that simulates farmers’ economic behaviour under the assumption of gross margin maximisation being the main goal of farmers’ actions.The analysed policy options were both a targeted and an untargeted incentive programme for reduced tillage, and a restriction option where high erosive crops are not allowed on high erodible field types. The results show that policy changes can have an impact on soil erosion. Furthermore, soil conservation policies are shown to have different levels of efficiency in terms of reduced soil erosion related to the costs of the policy. In the case of this study, a restriction option was more efficient than the incentive options. The results of such simulations can serve as a decision support for the development of soil conservation policies and help to foresee the effects of general changes of agricultural policies.     

从区位商视角论证构建城镇群的意义——以珠三角、大珠三角和泛珠三角区域为例

随着全球化和区域经济一体化的迅速发展,通过构建城镇群等城市联盟增强区域整体实力已成为提升城市竞争力积极有效的手段。从二十世纪九十年代初期起,先后形成的珠三角、大珠三角和泛珠三角城镇群,通过城市间的资源互补和优势扩散,带动区域整体水平,取得了跨越式发展。本文通过对珠三角、大珠三角和泛珠三角地区不同层次下各城市及区域主要产业就业人口区位商的计算比较,揭示了珠三角区域在制造业方面,大珠三角区域在生产性服务业方面及泛珠三角区域在生活性服务业方面的竞争优势,体现了不同层次城镇群内各行业的竞争发展趋势,由此验证了建立不同层次城镇群的必要性和竞争优势,为区域合作的政策措施提供一定的理论依据。