带核实赋值环上的多项式矩阵

本文旨在研究带核实赋值环上的多项式矩阵．在本文中，关于带核实赋值环上的多项式矩阵的半代数点定理被建立，同时正定矩阵与半正定矩阵的平方和表示也得到表明．     

中国法定的房地产估价体系及对应模式

根据《中华人民共和国城市房地产管理法》第三条、第三十二条、第三十三条的规定，刻划出中国房地产估价体系的法定总框架，提出了一个基于《中华人民共和国城市房地产管理法》和国际惯例的评估技术路线，用以证明中国法定的房地产估价体系。     

中国通用航空产业发展特征、关键问题及模式选择

通用航空保险分散低空飞行风险、增强产业经济带动效应的核心功能是多元化解中国通用航空产业发展矛盾及困境的有效助力。研究发现,中国通用航空保险风险转移能力受限,且防灾减损功能缺失,其中,通用航空器运营者(所有者)保险有效针对性不足、飞行员保险保障低下和航空运动保险缺位问题突出。在法规条例缺位、行业背景支撑不足以及承保技术落后和管理组织集中化的背景下,通用航空保险发展受阻,难以发挥缓解产业发展困境的作用。在此基础上,提出走出困境、筹建并优化中国通用航空保险制度的可行路径：制定《通用航空保险条例》,并撰写配套的《通用航空保险操作指南》,完善中国通用航空保险法律制度;分阶段建立以传统商业保险为主体、航空运动保险为重点、自保公司为补充的通用航空保险体系;筹建通用航空安全服务体系,缓解通用航空保险防灾减损功能缺失现状。

     

农业高科技企业成长机会价值量化模型构建及其应用

农业高科技企业成长机会包括农业高新技术研发和市场推广,是一个系列递进买方期权。其价值是农业高科技企业价值的核心部分。本文利用二项式分布模型构建了时间和概率因素下成长机会的期权形式价值量化模型,总结了农业高科技企业的期权性质及其特点,并以此为基础,进一步讨论了成长机会价值量化模型在农业高科技企业价值评估中的应用。     

基于利润的股票定价模型研究

股息现值模型 (Gordon model)、税后利润再投资有限增长模型 (Gordon and Gordon m odel)以及简化后的税后利润再投资有限增长模型 (Morris m odel)都无法为亏损公司的股票定价。根据弱有效市场假设 ,提出基于净利润的股票定价模型。该模型允许公司未来几年把全部或部分利润投资于盈利项目。利用该模型投资者可以计算不同类型上市公司股票的投资价值     

基于模糊层次综合评判方法的企业投资财务评价

企业投资管理的财务评价包括数量评价和质量评价两个方面,其中投资管理的数量评价是与企业战略发展结构的贯彻、核心能力的强化以及管理控制的跟进息息相关的;投资管理的质量评价则建立在时间价值和现金流量的考量之上。鉴于企业财务信息的模糊性特征,建立基于模糊层次综合方法的企业投资管理的财务评价方法,无疑为企业投资管理的财务评价开辟了一种新的思路。     

The effect of information on health risk valuations

This article examines the effect of familiarity with chronic lung disease on people's willingness to pay to reduce their risk of contracting chronic bronchitis, and on their willingness to increase their risk of auto death to reduce chronic bronchitis risk. We find that persons who have a relative with chronic lung disease are willing to give up more income to reduce their risk of chronic bronchitis than persons with no first-hand knowledge of the disease; however, their willingness to increase their risk of auto death to reduce their risk of chronic bronchitis is no different, on average, than persons with no first-hand knowledge of lung disease. This suggests that responses to risk-risk tradeoffs may be more stable than responses to risk-income choices.This research was sponsored by Resources for the Future and by the U.S. Environmental Protection Agency, Office of Policy Planning and Evaluation, Alan Carlin and Joel Scheraga, project officers. We thank Robert Mitchell for his help in conducting focus groups, and Caroline Harnett and Sari Radin for research assistance. Stan Presser, Sue Dowden, and Tim Triplett of the University of Maryland's Survey Research Center administered the survey. We especially thank Stan Presser for his suggestion that we sample relatives of people with chronic lung disease. We also thank Kip Viscusi, Wes Magat, and Joel Huber for making available their computer programs and data, and Ajay Kalra for programming help. Paul Portney and John Mullahy provided useful comments on an earlier draff of the article, as did two referees.     

工程量清单和合理低价评标法的探讨

探讨在适应市场机制和W TO的工程量清单计价模式下,建设工程招标定标过程中采用“合理低价评标法”可能出现的无序低价的情况及危害,并且提出解决此问题的几点建议。     

Valuing housework time from willingness to spend time and money for environmental quality improvements

We develop a new approach to assessing the value of home production time based on willingness to spend time and money to obtain environmental improvements. When peoples’ choice is constrained by time as well as money, measures of willingness to pay can be defined with respect to either numeraire. In a model that explicitly allows for multiple shadow values of time, we show that the willingness to pay time and money measures are linked through the value of saving time. With survey information on peoples’ willingness to spend additional time on housework activities, as well as pay money, to obtain environmental quality improvements, joint estimation within a utility-consistent structure produces estimates of both willingness to pay and the value of saving housework time. From the value of saving housework time, the marginal value of housework time can be readily identified. When applied to Korean households’ valuation of water quality improvements in the Man Kyoung River, we find that the value of housework time is 70–80% of the market wage.