Rice quality in relation to market prices in Yunnan Province

Factors affecting rice quality and their impacts on market price were investigated in this study. On-farm survey and market survey was undertaken in three selected sites namely Kunming, Dali, and Xishuangbanna in Yunnan Province, China. Market sampling was conducted to determine important rice quality characteristics. Sixty milled rice samples were collected from domestic markets of the three sites during a period of Mar to Apr in 1994. The grain physicochemical properties of the milled rice samples were analyzed on the basis of Chinese Agricultural Ministry Standard for testing rice quality. A hedonic price model (implicit price model) was further employed to quantify relationships between quality characteristics and market prices of rice. The model can be expressed mathematically as the following function (1) This function shows that the average price paid by consumer for different grades of rice with attribute Xj. Using the ordinary least square (OLS) regression of observed market prices on measures

中国股指期货“助涨助跌效应”实证研究

利用E-G两部法协整检验、向量误差修正模型、VAR模型、Granger因果性检验及脉冲响应和方差分解全面剖析了股指期货与现货市场之间的联动性。实证研究结果表明股指期货和股票指数之间存在长期的均衡关系,股票指数短期的过度偏离会导致长期非均衡误差的弱势修正,当市场受到确定性信息冲击时,股票期货市场对股票现货市场具有助涨助跌作用;当市场受到不确定信息冲击时,股票现货市场对股票期货市场具有助涨助跌作用。