Canadian Consumer Willingness to Pay for Omega-3 Meat

This study analyzes Canadian consumer willingness to pay for omega-3 enhanced beef, pork, and chicken. Using a nationwide survey conducted by ACNielsen in 2006 and choice modeling framework, results indicate that smaller household, households with high incomes, and households that have previously purchased an omega-3 product are willing to pay a premium for omega-3 beef, pork and chicken. The results also suggest that consumers that have previously purchased an omega-3 product are willing to pay a higher premium for the respective omega-3 meats compared to households that have never purchased an omega-3 product. Also, premiums are highest for omega-3 beef, followed by omega-3 pork, and last, omega-3 chicken.     

Effects of an animal disease shock on meat markets and producer income

This paper simulates pig producer and slaughterhouse income losses due to a classical swine fever outbreak in Finland. The analysis explicitly takes into account that an outbreak of a highly contagious animal disease can shrink export demand for pig meat. After having observed the disease and its impact on pig meat price, producers can optimize animal stocks thought insemination decisions, which affects the number of animals in a dynamic manner. The income losses of pig industry were estimated to be less than €30 million. The losses were mainly due to price movements caused by an export demand shock. The results suggest that if the outbreak causes distortions in meat trade, the disease can cause substantial losses to the industry even if it has directly a small impact on the number of animals on farms. We also found that the optimization could reduce disease losses significantly, even more than 50%.     

对齐朝荣《漫说林黛玉》的若干批评

齐朝荣的《漫说林黛玉》一文存在着若干偏颇认识,值得认真分析,“拔乱反正”。     

红色旅游成功因素分析

在我国,发展红色旅游具有得天独厚的优势和特殊重要的现实意义与深远的历史意义。红色旅游在我国之所以能够取得成功,关键在于红色旅游在我国具备快速发展的条件,满足了各种目标需求,得到全社会的强势推进。     

基于GIS的江西省红色旅游资源空间分布格局分析——以不可移动革命文物为例

保护好、管理好、运用好革命文物,要深入开展革命文物专项调查,加强科学保护,开展系统研究。江西省是红色资源大省和红色旅游的策源地,留下了大量革命文物的红色资源。本研究以江西省的红色资源(国家级与省级的不可移动革命文物)为研究对象,运用GIS空间分析方法定量分析江西省革命文物的空间分布特征。结果表明:江西省革命文物点分布集中,但是点分布较为零散,空间分布整体上呈不均衡态势。要做好江西省红色资源的调研和管理工作,促进红色资源的特色旅游开发,科学地保护好、利用好革命文物等红色资源,弘扬革命文化,传承红色基因,推进革命传统爱国主义教育。     

浅析佳县红枣产生裂变原因及对策

主要依据佳县红枣的实际情况,根据下乡调研观察,总结出佳县红枣产生裂变的原因。主要从红枣的品种、生长的环境、土肥水管理等方面对比分析了佳县红枣产生裂变的原因,然后提出了对应的防裂变的对策措施,促进佳县红枣产业健康稳定发展。     

Developing farm-specific marginal abatement cost curves: Cost-effective greenhouse gas mitigation opportunities in sheep farming systems

Growing demand for agricultural produce, coupled with ambitious targets for greenhouse gas emissions reduction present the scientific, policy and agricultural sectors with a substantial mitigation challenge. Identification and implementation of suitable mitigation measures is driven by both the measures’ effectiveness and cost of implementation. Marginal abatement cost curves (MACCs) provide a simple graphical representation of the abatement potential and cost-effectiveness of mitigation measures to aid policy decision-making. Accounting for heterogeneity in farm conditions and subsequent abatement potentials in mitigation policy is problematic, and may be aided by the development of tailored MACCs. Robust MACC development is currently lacking for mitigation measures appropriate to sheep systems. This study constructed farm-specific MACCs for a lowland, upland and hill sheep farm in the UK. The stand-alone mitigation potential of six measures was modelled, against real farm baselines, according to assumed impacts on emissions and productivity. The MACCs revealed the potential for negative cost emissions’ abatement in the sheep industry. Improving ewe nutrition to increase lamb survival offered considerable abatement potential at a negative cost to the farmers across all farms while, lambing as yearlings offered negative cost abatement potential on lowland and upland farms. The results broadly advocate maximising lamb output from existing inputs on all farm categories, and highlight the importance of productivity and efficiency as influential drivers of emissions abatement in the sector. The abatement potentials and marginal costs of other measures (e.g. reducing mineral fertiliser use and selecting pasture plants bred to minimise dietary nitrogen losses) varied between farms, and this heterogeneity was more frequently attributable to differences in individual farm management than land classification. This has important implications for the high level policy sector as no two farms are likely to benefit from a generic one size fits all approach to mitigation. The construction of further case-study farm MACCs under varying farm conditions is required to define the biophysical and management conditions that each measure is most suited to, generating a more tailored set of sector-specific mitigation parameters.     

中州铝厂烧结法赤泥“霜”物质研究

为了分析赤泥“泛霜”现象的成因，采用X-衍射、扫描电子显微镜、原子吸收等方法研究了中州铝厂各时期烧结法赤泥“霜”物质的化学：组成、矿物组成、微观形态等，结果表明，可按溶解性将白色“泛霜”物质分为可溶钠钾盐类与不可溶钙镁盐类，为解决赤泥建材产品“泛霜”问题奠定了理论基础。     

A Sample Selection Approach to Censored Demand Systems

The multivariate sample selection model is extended to a nonlinear equation system with partial selection and applied to household meat consumption in China. Elasticity estimates differ from those obtained from conventional maximum likelihood and Tobit estimates. Chinese meat products are gross complements while net substitution also exists in some cases.