China＇s hog production is undergoing a great transformation due to the soaring demand and changing raising system. Regarding the essential role of pork in Chinese diet, a systematic analysis on the productivity and e...China＇s hog production is undergoing a great transformation due to the soaring demand and changing raising system. Regarding the essential role of pork in Chinese diet, a systematic analysis on the productivity and efficiency of hog production can provide significant implications for policy makers. This paper investigates the productivity and efficiency of hog production and the determinants of technical efficiency in China using a household level panel data（2004–2010）. A stochastic frontier translog production function with scaling property in inefficiency term is adopted for hog production analysis, and the determinants of technical efficiency are incorporated in a one-step estimation using maximum likelihood estimation. Our results show that the average technical efficiency of hog production in China is 0.5914. More importantly, we find that specialized farmers have higher technical efficiency than others, and technical efficiency in the eastern region is higher than that in Central and West China.展开更多
From 1985, an increasing gap has emerged between the official statistical measures of meat production and meat consumption in China, which has raised concerns from many researchers using such data. In this paper we re...From 1985, an increasing gap has emerged between the official statistical measures of meat production and meat consumption in China, which has raised concerns from many researchers using such data. In this paper we report the results of 428 observations（survey of 107 urban and rural households×4 quarters） from 7 provinces conducted in 2010, and compare them with the official statistical data from the National Bureau of Statistics of China（NBSC）. We conclude that the main reason for the discrepancy is due to the underreporting of consumption, which is due mainly to the omission of consumption away from home.展开更多
在最近进行的尿检中发现:邻苯二甲酸盐(Phthalates)的含量比以前预想的要高。而Phthalates are used as stabilizer(稳定剂)in cosmetics and softeningagents in plastics like polyvinyl([化]乙烯聚合物的)chloride(氯化物)(PVC)。这...在最近进行的尿检中发现:邻苯二甲酸盐(Phthalates)的含量比以前预想的要高。而Phthalates are used as stabilizer(稳定剂)in cosmetics and softeningagents in plastics like polyvinyl([化]乙烯聚合物的)chloride(氯化物)(PVC)。这就值得引起我们的密切注意。 这些毒物残留在人体内时,会导致何种疾病,尚有待探究:The only questionremaining is what types of illnesses might be related to the exposure。然而,有一点是肯定的,我们所熟悉的PVC应该停止使用: In 1997,Greenpeace(保护动物不遭捕猎等的绿色和平组织)testedchildren’s toys and identified five of the seven phthalates mentioned in the currentCDC report.Greenpeace has since called for an international phase out(逐步停止使用)of PVC。展开更多
基金sponsored by the National Natural Science Foundation of China(71473123,71333008)A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),ChinaChina Center for Food Security Studies,Nanjing Agricultural University,China
文摘China＇s hog production is undergoing a great transformation due to the soaring demand and changing raising system. Regarding the essential role of pork in Chinese diet, a systematic analysis on the productivity and efficiency of hog production can provide significant implications for policy makers. This paper investigates the productivity and efficiency of hog production and the determinants of technical efficiency in China using a household level panel data（2004–2010）. A stochastic frontier translog production function with scaling property in inefficiency term is adopted for hog production analysis, and the determinants of technical efficiency are incorporated in a one-step estimation using maximum likelihood estimation. Our results show that the average technical efficiency of hog production in China is 0.5914. More importantly, we find that specialized farmers have higher technical efficiency than others, and technical efficiency in the eastern region is higher than that in Central and West China.
基金supported by the Earmarked Fund for Modern Agro-Industry Technology Research System,China(CARS-42-G24)the Agricultural Science and Technology Innovation Program,China(ASTIP-IAED-2015-01)+1 种基金the Project of Construction of Innovative Teams and Teacher Career Development for Universities and Colleges Under Beijing Municipality,China(IDHT20140510)the Project of Strategy of Ensuring China’s Animal Products Eatable Safety(13BGL098)
文摘From 1985, an increasing gap has emerged between the official statistical measures of meat production and meat consumption in China, which has raised concerns from many researchers using such data. In this paper we report the results of 428 observations（survey of 107 urban and rural households×4 quarters） from 7 provinces conducted in 2010, and compare them with the official statistical data from the National Bureau of Statistics of China（NBSC）. We conclude that the main reason for the discrepancy is due to the underreporting of consumption, which is due mainly to the omission of consumption away from home.
文摘在最近进行的尿检中发现:邻苯二甲酸盐(Phthalates)的含量比以前预想的要高。而Phthalates are used as stabilizer(稳定剂)in cosmetics and softeningagents in plastics like polyvinyl([化]乙烯聚合物的)chloride(氯化物)(PVC)。这就值得引起我们的密切注意。 这些毒物残留在人体内时,会导致何种疾病,尚有待探究:The only questionremaining is what types of illnesses might be related to the exposure。然而,有一点是肯定的,我们所熟悉的PVC应该停止使用: In 1997,Greenpeace(保护动物不遭捕猎等的绿色和平组织)testedchildren’s toys and identified five of the seven phthalates mentioned in the currentCDC report.Greenpeace has since called for an international phase out(逐步停止使用)of PVC。
