Capturing structural changes in French meat and fish demand over the period 1991 2002

A time-varying coefficient demand system, the Markov switchingalmost ideal demand model, is proposed to shed new light onchange over time in the structure of French meat and fish demand.The main feature of this model is that the switching mechanismfrom one structure of demand to the other is controlled by anunobserved variable that follows a Markov chain. Our model accuratelycaptures the two Bovine Spongiform Encephalopathy (BSE) crisesof recent years. We estimate that the 1996 BSE crisis lastedalmost three years, whereas the second BSE crisis for just lastedfive 4-week periods.     

Food scares, market power and price transmission: the UK BSE crisis

This paper is concerned with the impact of food scares, principallythe BSE crisis in the UK, and focuses on price transmissionin vertically related markets. We show that if market powerhas an effect on the farm–retail margin, this determinesthe specification of the cointegrating relationship and thusprovides a test of market power. The results for the UK beefchain suggest that we cannot reject the importance of marketpower. The impact of the BSE crisis on farm prices is foundto be more than double that on retail prices, thus corroboratingpublic concerns regarding a differential impact of food scareson retailers and producers.     

The demand for food and beverages in Norway

The demand for food and beverages is estimated within a three-stage demand model. The separability structure of the model is checked by nonparametric tests. Some generalized axiom of revealed preference (GARP) violations are detected in one of the subsystems. However, they are removed by small adjustments in the quantities of fish, and the violations are interpreted as results of measurement errors. The almost ideal demand system is used in the static and a dynamic version. The results of various specification and misspccification tests suggest that the static version performs poorly as compared with the dynamic version. Norwegian demand elasticities for disaggregate food commodities have rarely been estimated within a system framework, so the results are of intrinsic interest. The elasticities estimated by using the dynamic model are of the expected signs and reasonable magnitudes. The values are stable over time for most commodities. Elasticities estimated within a subsystem are conditional on the goods included in that system, and they may differ from the more policy relevant unconditional elasticities estimated within a system including all goods. Adjustment formulas are used to approximate the unconditional elasticities from the estimated conditional elasticities. There are considerable differences between the numerical values of the conditional and unconditional elasticities for several of the foods. The unconditional own-price elasticities are in the interval-0.20 to-0.89. The own-price elasticities for hot drinks and for milk are most inelastic. The unconditional expenditure elasticities for food-away-from-home, fish, soft drinks, and alcoholic beverages are above one, while the expenditure elasticity for hot drinks is about zero.     

Demand for red meat,poultry, and fish in Morocco: an almost ideal demand system

There is a paucity of data and basic research needed for policy analysis in Morocco. Subjective estimates for elasticities are currently used in making policy recommendations. An Almost Ideal Demand System model is used to estimate demand elasticities for beef, mutton, poultry, and fish in Morocco. Mutton is shown to be a luxury good reflecting Moroccans' preference for mutton. Demand is shown to be more elastic than has been assumed in some past policy analyses.     

Quadratic Differential Demand Systems and the Retail Demand for Pork in Great Britain

The primary objective of this paper is to derive a general synthetic quadratic (rank 3) differential demand system which nests within it a range of testable differential demand models including the quadratic AIDS, CBS, Rotterdam and NBR systems. A model selection test procedure is also outlined. These differential systems are then applied and tested to analyse the monthly retail demand for cuts of pork in Great Britain over the period 1989–2000. The empirical results suggest that a quadratic differential AIDS model is most appropriate for the pork demand system studied, but that the need for inclusion of quadratic income/expenditure terms is not universal for every cut within the demand system. Quadratic expenditure effects were appropriate for pork chops and leg roasts, but log linear expenditure effects were adequate for bellies, shoulders and loin roasts. Roasting cuts were expenditure and own price elastic, with pork loins, chops and bellies all expenditure and own price inelastic.     

肉制品生产加工中的质量安全问题探讨

肉制品是人们生活中经常食用的产品之一,富含人类生存所需的多种营养物质,但同时也是各种疾病传播的媒介.想要保证肉制品的质量,需要对肉制品生产加工环节的质量安全进行严格把控.本文简单分析了肉制品生产加工中的质量安全问题,提出了肉制品质量问题的解决办法,从温度控制、质量检测、加工管理和销售监测等环节进行细致剖析,指导肉制品生...     

The influence of immigration and international tourism on the demand for imported food products

The role of immigration and international tourism in food product imports, as two factors which potentially influence the (trans-) formation of tastes in a country, is theoretically and empirically analysed. In using an econometric error-correction specification of an import demand function, the scale of the impact of these two factors is estimated for the case of Germany (annual data from 1967 to 1990). The results show that, while aggregate food import demand from India, Thailand, China and Turkey is inelastic with regard to migration to Germany and international travel activities of Germans to these destinations, the estimated average elasticities for imports of wine, cheese and processed/preserved vegetables from France and Italy are all well above unity, thus suggesting that immigration and international tourism may indeed affect the import demand for certain food products.     

东北地区城市水资源利用及其用水需求预测

从用水总量,用水结构,城镇人均生活用水量和万元工业产值用水量等方面。对东北3省区城市水资源利用的特征进行了分析;在对上述地区城市社会经济发展指标预测的基础上,对2010年和2030年城市社会经济发展的水资源需求量进行了预测。     

Measurement Error in Recall Surveys and the Relationship between Household Size and Food Demand

Variation in household survey design and implementation is used to obtain evidence of nonrandom measurement error in recall surveys of household expenditure. These surveys, which are used especially in developing countries, appear to have measurement errors in food expenditures and in food budget shares that are correlated with household size. These correlated errors may be part of the explanation for a puzzling pattern of falling food demand with rising household size in poorer countries.     

广东高职院校食品类专业设置与区域酒类产业对接研究

广东省是我国酒类消费第一大省,酒类产业是广东食品产业的新兴经济增长点.为主动适应区域内酒类产业发展对人才的需求,优化专业布局,本文以广东省高职院校食品类专业为例,分析专业设置中存在的问题,探讨专业结构调整和优化动态机制的构建路径,为广东省高职院校食品类专业设置与酒类产业发展的有效对接提供参考.     

林地确权后林农林业收支变化及配套政策需求分析——基于云南省林改前,2009年,2010年调研数据

林地确权是集体林权制度改革的首要任务,它是集体林改深入推进的前提。本研究通过实地调查,利用云南省林改前、2009年、2010年的调研数据,从林农的角度探讨林地确权对林农林业收入、林业生产投资、配套政策需求等方面产生的影响,反映云南省林改的成效。并从发展林下经济、引导林业投资、完善配套政策三方面提出建议,以期促进林改工作稳步推进,将林改价值深化和延伸。