THE OPTIMUM MODEL AND ITS DECISION SUPPORT SYSTEM OF COAL QUALITY BALANCE

The meaning and significance of coal quality balance are summaized in this paper.Practical steps concerning constructing the synthetic tech-economic model and its decision support system of coal quality balance using the optimization techology of inverse recurrence of established initializing parameters are also introduced. The principles and methods as being applied in the model system development and procedure construction are discussed accordingly.

自然资源约束、质量信息成本与食品原料行业的市场失灵

本文首先建立了一个传统农业技术条件下单质量食品原料市场均衡模型,以分析食品原料市场需求的扩大如何导致耕地价格的上涨。然后引入资源及质量替代型技术进步等因素,构建了一个多质量食品原料市场均衡模型。分析表明,存在一个临界收入水平,只有收入超过此水平的消费者会选择高质量商品,且在不完全质量信息情形下,高质量商品价格将因支付信号传递成本而高于完全质量信息情形。因此,资源及质量替代型技术进步通常并不是帕累托改进,且随着消费者整体收入水平的提高,这类技术进步的社会总福利效果最终有可能为负,即意味着市场失灵。本文还基于中国农产品生产与消费数据,对本文模型分析的主要假定与推论进行了初步验证。