我国粮食生产补贴政策浅析

文章回顾梳理了2004年以来中央出台的强农惠农政策,指出粮食生产补贴政策体系初步建立。从4个方面阐述了补贴政策有力地促进了粮食生产,一是调动了生产积极性,二是改善了生产装备条件,三是促进了关键技术落实,四是促进了生产方式转变。最后,提出完善粮食生产补贴政策的地点建议:一要稳定收入补贴,二要强化技术补贴,三要探索机制补贴,四要建立大县大户补贴。     

航电枢纽工程财务增效机制研究

航电枢纽工程大多面临投资大、运行费用高、发电产出少、财务效益差等问题。为促进其可持续发展,真正实现以电养航,在对航电工程财务因子敏感性分析的基础上,依托嘉陵江流域典型枢纽,深入研究其财务增效机制。研究表明,争取电价补贴和调整资本金结构并举是改善航电枢纽运营环境,增强企业经营活力的有效、可行措施。     

Cropland use,yields, and droughts: spatial data modeling for Burkina Faso and Niger

For countries with recurrent droughts, the design of drought impact mitigation measures could benefit from analyses of determinants of yields and prices of local crops at regional and district level. This study applies dynamic spatial panel data regression models to yields and prices of four major food crops across regions of Burkina Faso and Niger, over sample periods between 1984 and 2006. Results lend support to mainly simultaneous spatial spillovers, particularly for millet and cowpea prices and sorghum yields in Niger, and maize yields in Burkina Faso. After accounting for these effects, most crop yields are found to be weakly price‐responsive, as envisaged by a supply‐side geographical diffusion hypothesis. Seasonal rainfall elasticity estimates suggest that dominant food crops have slight advantage margins in terms of relative resilience to rainfall shortages. However, this result is to be weighed against low millet yields in Niger, and marked drops in sorghum yields during officially declared droughts in Burkina Faso.     

Consumer demand for nutrition versus taste in four major food categories

This study addresses the trade‐off between nutrition and taste in expenditure on breakfast cereal, milk, bread, and soft drinks. Within each category, products have similar cost and convenience, but have markedly different flavor and nutritional content. Using annual expenditure data for a large sample of households participating in the ACNielsen Homescan system, we regress a measure of “healthiness” on household demographics and market prices, and find that households with college‐educated heads and higher incomes made significantly healthier choices in all four categories. These effects are puzzling in that the nutritional differences between products were well known to consumers, and there are no cost or convenience differences between them. The presence of children was associated with less healthy choices, especially for cereal and bread, while older households made healthier choices in all categories except milk.     

Who shapes network neutrality policy debate? An examination of information subsidizers in the mainstream media and at Congressional and FCC hearings

Recognizing policy-making process as a communicative process, this study examines who has subsidized information relating to the net neutrality policy debate. Empirical data has been collected from net neutrality stories published in four national newspapers, as well as from hearings by Congress and the Federal Communications Commission (FCC), during the period of February 2004 through January 2009. Study findings reveal that corporate interests have played a significant role in subsidizing information on net neutrality, both to the public through the mainstream media and to legislators through Congressional hearings. Furthermore, study results show that experts played a larger role in defining net neutrality through the mainstream media and FCC hearings than they did through Congressional hearings. Finally, the role of advocacy group representatives was more apparent at Congressional hearings than via the other two available information channels.     

Household food demand in Turkey: A two-step demand system approach

Demands for sixteen food products are investigated, using data from the Turkish Household Expenditure Survey. The linear approximate almost ideal demand system (LAIDS) is estimated with Shonkwiler and Yen’s two-step procedure. All own-price elasticities are negative and expenditure elasticities positive. Bread, other cereals, bovine, mutton, giblets, and cheese have high expenditure elasticities. Mutton, bovine, and several other protein-rich products are price elastic. Results suggest a mix of gross substitutes and complements, while net substitution is the dominant pattern. Demographic characteristics also play important roles in shaping food demand. The elasticity estimates can inform policy deliberations.     

How can the EU climate targets be met? A combined analysis of technological and demand-side changes in food and agriculture

To meet the 2 °C climate target, deep cuts in greenhouse gas (GHG) emissions will be required for carbon dioxide from fossil fuels but, most likely, also for methane and nitrous oxide from agriculture and other sources. However, relatively little is known about the GHG mitigation potential in agriculture, in particular with respect to the combined effects of technological advancements and dietary changes. Here, we estimate the extent to which changes in technology and demand can reduce Swedish food-related GHG emissions necessary for meeting EU climate targets. This analysis is based on a detailed representation of the food and agriculture system, using 30 different food items.We find that food-related methane and nitrous oxide emissions can be reduced enough to meet the EU 2050 climate targets. Technologically, agriculture can improve in productivity and through implementation of specific mitigation measures. Under optimistic assumptions, these developments could cut current food-related methane and nitrous oxide emissions by nearly 50%. However, also dietary changes will almost certainly be necessary. Large reductions, by 50% or more, in ruminant meat (beef and mutton) consumption are, most likely, unavoidable if the EU targets are to be met. In contrast, continued high per-capita consumption of pork and poultry meat or dairy products might be accommodated within the climate targets. High dairy consumption, however, is only compatible with the targets if there are substantial advances in technology. Reducing food waste plays a minor role for meeting the climate targets, lowering emissions only by an additional 1–3%.     

关于食品添加剂与食品安全的研究

随着人们生活水平的提高,饮食安全逐渐成为人们关注的重点问题之一,特别是食品中的添加剂,一直是备受人们关注的食品安全问题。为了帮助人们更好地了解食品添加剂,进一步保证人们的正常食品安全,根据笔者自身多年的工作经验,总结了当前比较常见的一些食品添加剂,并对其作用和应用现状进行了简单的介绍,然后对当前存在的食品安全问题提出几点建议,以期有助于我国人民改善当前食品安全问题。     

新形势下省级以食品业务为主的综合检验机构生存和发展

一直以来,食品检验在省级综合检验机构整个业务中占很大比重,随着食品监管行政职能的转变,导致综合检验机构在食品领域的业务量锐减,本文从质检系统本身的管理和外部竞争对手的威胁等方面对此现象进行了分析,并提出相应的调整措施。     

天然抗氧化剂茶多酚在食品贮藏保鲜中的应用

茶多酚主要由茶叶中提取而来,可用作食物贮藏和保鲜的天然抗氧化剂。由于其具有抗氧化、防癌、减脂和除臭等多项优点而受到越来越多的关注,目前,该物质已在医疗、食品和冷藏等多个领域得到广泛应用。本文主要针对茶多酚的抗氧化原理进行分析,并简单介绍其在食物保鲜方面的应用,希望为我国关于茶多酚的研究工作提供帮助。