Consulta: subjectFacets:"C34"
Registros recuperados: 24
Data/hora: 16/06/2024 06:48:37

Estimation of a Censored AIDS Model: A Simulated Amemiya-Tobin Approach
Provedor de dados: 31
Autores: Dong,   Diansheng; Kaiser,   Harry M.
Kuhn-Tucker approach and its dual have been proposed to the demand system estimation when there are non-negativity bindings. However, empirical researchers have been struggling two decades in applying this method into practice due to: (1) the difficulty in derivation of a coherent econometric model, and (2) the cumbersome evaluation of high order probability integrals needed in parameter estimation. In this paper, we avoid the above two issues by using the Amemiya-Tobin demand system approach and the simulation procedure to evaluate the probability integrals. An AIDS model is estimated and the elasticities are obtained that are impossible to achieve when using Kuhn-Tucker approach. The model is applied to an analysis of Canadian household food demand.
Tipo: Technical Report
Palavras-chave: Amemiya-Tobin; Censored demand system; AIDS model; Probability simulation; Canadian household food demand; Demand and Price Analysis; Research Methods/ Statistical Methods; C34; D12.
Ano: 2003
URL: http://purl.umn.edu/122113

DEMAND FOR BREAKFAST CEREALS: WHOLE GRAINS GUIDANCE AND FOOD CHOICE
Provedor de dados: 31
Autores: Ishdorj,   Ariun; Jensen,   Helen H.
When using household-level data to examine consumer demand it is common to find that consumers purchase only a subset of the available goods, setting the demand for the remaining goods to zero. Ignoring such censoring of the dependent variables can lead to estimators with poor statistical properties and estimates that lead to poor policy decisions. In this paper we investigate household demand for four types of breakfast cereals, such as whole grain ready-to-eat, non-whole grain ready-to-eat, whole grain hot and non-whole grain hot cereals, using a censored Al- most Ideal Demand System (AIDS) and estimate the parameters of the model via Bayesian methods. Using household level scanner data (ACNielsen Homescan) we find that demand for all types of breakfast...
Tipo: Conference Paper or Presentation
Palavras-chave: AIDS model; Bayesian econometrics; Censored; Cereals; Whole grains; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; C11; C34; D12.
Ano: 2010
URL: http://purl.umn.edu/116445

The Effects of a Sugar-Sweetened Beverage Tax: Consumption, Calorie Intake, Obesity, and Tax Burden by Income
Provedor de dados: 31
Autores: Lin,   Biing-Hwan; Smith,   Travis A.; Lee,   Jonq-Ying.
Taxing sugar-sweetened beverages has been proposed as a means to reduce calorie intake, improve diet and health, and generate revenue that governments can use to address the obesity-caused health and economic burden.  Two beverage demand systems were estimated using beverage purchase data for high-income and low-income households.  Using the estimated demand elasticities we examined the impacts of a hypothetical 20-percent effective tax rate (or about 0.5 cent per ounce) on beverage consumption, calorie intake, tax revenue and burden.  Our results suggest that such a tax would induce an average reduction of 35 and 41 calories a day among adults and children, respectively.  The tax burden is found to be regressive, although representing less than one...
Tipo: Conference Paper or Presentation
Palavras-chave: Beverage demand; Sugar-sweetened beverage tax; Soda tax; Obesity; Tax revenue; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Health Economics and Policy; C34; D12; Q18.
Ano: 2010
URL: http://purl.umn.edu/61167

New Results On Censored Regression with Applications to Transactions Costs, Household Decisions and Food Purchases
Provedor de dados: 31
Autores: Holloway,   Garth J.; Mazzocchi,   Mario; Perali,   Carlo Federico.
We generalize the Tobit censored regression to permit unique unobserved censoring thresholds conditioned by covariates and a set of common response coefficients. This situation , we argue, is one arising frequently in applications of censored regression and we provide three diverse examples to motivate the theory. We derive a robust estimation algorithm with three noteworthy features. First, by augmenting the observed-data likelihood with the censored observations, the estimation strategy is the same as Chib (1992) who derives Bayes estimates of the conventional censored regression. Second, by virtue of its generality, the model is applicable to a much broader set of circumstances than the conventional Tobit regression, which is nested as a special case of...
Tipo: Conference Paper or Presentation
Palavras-chave: Conditionally censored Tobit regression; Bayes inference; Food Consumption/Nutrition/Food Safety; O11; C34; O13.
Ano: 2006
URL: http://purl.umn.edu/25293

Pesticides Uses in Crop Production: What Can We Learn from French Farmers Practices?
Provedor de dados: 31
Autores: Fadhuile,   Adelaide; Lemarie,   Stephane; Pirotte,   Alain.
This article focuses on the demand system of French farmers concerning pesticides uses. We estimate the demand elasticities of herbicides, insecticides and fungicides with respect to pesticide expenditure, and considering crop differentiation. Then we compare two indexes that are used in agronomic literature to measure the intensity of pesticides uses. We retain a Linear Approximated Almost Ideal Demand System (LA/AIDS) specification. A Full-Information Maximum Likelihood estimation procedure is used for dealing with the problem of censored dependent variable. We consider two cross-sections observed in 2001 and 2006 covering pesticides uses of three crops. We confirm the previous results of the literature that farmers response to price variation is very...
Tipo: Conference Paper or Presentation
Palavras-chave: Pesticides; LA/AIDS; Elasticities; Censored System of Equations; Two-Step procedure; Quasi Maximum Likelihood; Full-Information Maximum Likelihood.; Agricultural and Food Policy; Crop Production/Industries; Demand and Price Analysis; C30; C31; C34; L11; Q11; Q12.
Ano: 2011
URL: http://purl.umn.edu/103654

Consumer Demand for Meat Cuts and Seafood
Provedor de dados: 31
Autores: Davis,   Christopher G.; Lin,   Biing-Hwan; Yen,   Steven T.
Household at-home consumption of different types and cuts of meat and fish products is investigated by estimating a large censored demand system with a two-step procedure using ACNielsen's Homescan data. We find different price and expenditure elasticities between low-income and high-income households. High income households are less responsive to price changes, and the substitution patterns also differ between the low- and high-income households. Whereas the uncompensated elasticities suggest a mixture of gross substitutes and complements among the products for both low- and high-income households, the compensated elasticities suggest net substitution is the obvious pattern for the low-income households.
Tipo: Conference Paper or Presentation
Palavras-chave: Censored dependent variables; Sample selection model; Meat; Fish; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; D12; C34.
Ano: 2007
URL: http://purl.umn.edu/9855

INFLUENCES OF THE GOVERNMENTAL MARKET INTERVENTIONS ON WHEAT MARKETS IN SERBIA DURING THE FOOD CRISIS 2007/2008
Provedor de dados: 31
Autores: Djuric,   Ivan; Goetz,   Linde; Glauben,   Thomas.
This paper analyzes how the market interventions of the Serbian government during the food crisis 2007/2008, inter alia a de facto export ban, have affected domestic wheat markets. Besides a comprehensive description of the crisis policy and its effects on the Serbian wheat market, we investigate how it influences the equilibrium and stability of the Serbian wheat market and its integration with the world market within a price transmission model. Applying a Markov-switching error correction model to weekly wheat grower prices in Serbia and world market prices, two states of the wheat market are identified. Our results suggest that although the long-run price elasticity did not change during the crisis, the market equilibrium was disrupted and the market...
Tipo: Conference Paper or Presentation
Palavras-chave: International market integration; Markov-Switching Error Correction Model; Serbia; Wheat market; World market price transmission; Agricultural and Food Policy; Crop Production/Industries; C34; Q11; Q13; Q17; Q18.
Ano: 2011
URL: http://purl.umn.edu/114438

BAYES' ESTIMATES OF THE DOUBLE HURDLE MODEL IN THE PRESENCE OF FIXED COSTS
Provedor de dados: 31
Autores: Holloway,   Garth J.; Barrett,   Christopher B.; Ehui,   Simeon K.
We present a model of market adoption (participation) where the presence of non-negligible fixed costs leads to non-zero censoring of the traditional double-hurdle regression.  Fixed costs arise due to household resources that must be devoted a priori to the decision to participate in the market.  These costs-usually a cost of time-motivate two-step decision-making and focus attentions on the minimum-efficient scale of operations (the minimum amount of milk sales) at which market entry becomes viable.  This focus, in turn, motivates a non-zero-censored Tobit regression estimated through routine application of Markov chain Monte Carlo Methods.
Tipo: Working or Discussion Paper
Palavras-chave: Market participation; Fixed costs; Double-hurdle model; Censored regression.; Financial Economics; O1; O11; C34; O13; Q16; D1.
Ano: 2002
URL: http://purl.umn.edu/14741

Health Insurance and Joint Off‐Farm Labor Allocation Decisions of Farm Families
Provedor de dados: 31
Autores: D'Antoni,   Jeremy M.; Mishra,   Ashok K.
Contact author to request a copy of this paper.
Tipo: Presentation
Palavras-chave: Health insurance coverage; Endogeneity; Copula; Off-farm labor supply; Dependence; Bivariate tobit; Coupled farm programs payments; Decoupled farm program payments; Agribusiness; Farm Management; Food Security and Poverty; Labor and Human Capital; Public Economics; C34; I13; J12; J22; J38; J43; Q12; Q18.
Ano: 2012
URL: http://purl.umn.edu/119646

Why Family Farms Are Increasingly Using Wage Labour?
Provedor de dados: 31
Autores: Blanc,   Michel; Cahuzac,   Eric; Elyakime,   B.; Tahar,   Gabriel.
In many developed countries, the share of wage employment out of the total agricultural labour force has been increasing for the last ten years. Using data from French agricultural censuses, we present an analysis of the factors that influence households' decisions about whether to work on the family farm or to work outside, and about the use of wage labour. Studying how the effects of these factors have varied between 1988 and 2000 enables us to highlight the different mechanisms that have led to an increase in permanent wage employment during that period. In particular, we show that family labour and permanent wage labour have become nearly equivalent in 2000, whereas that was not the case in 1988.
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural employees; Farms; Family labour; Labor and Human Capital; C34; C35; J22; J43.
Ano: 2005
URL: http://purl.umn.edu/24620

Bayesian Estimation of a Censored AIDS Model for Whole Grain Products
Provedor de dados: 31
Autores: Ishdorj,   Ariun; Jensen,   Helen H.
When using household-level data in examining consumer's demand it is common to find that consumers purchase only a subset of the available goods, setting the demand for the remaining goods to zero. Ignoring such censoring of the dependent variables in the estimation can lead to biased parameter estimates. In this paper we investigate the household's demand for six types of whole grain and non-whole grain breakfast cereals and products using a censored Almost Ideal Demand System (AIDS) and estimate the parameters of the demand system via Bayesian methods. Using 2006 ACNielsen Homescan data we find that demand for whole grain and non-whole grain ready-to-eat cereals is less responsive to changes in prices; demand for whole-grain bars and non-whole grain hot...
Tipo: Conference Paper or Presentation
Palavras-chave: AIDS model; Bayesian econometrics; Censored; Cereals; Whole grains; Demand and Price Analysis; C11; C34; D12.
Ano: 2008
URL: http://purl.umn.edu/6075

Micro-Demand Systems Analysis of Non-Alcoholic Beverages in the United States: An Application of Econometric Techniques Dealing With Censoring
Provedor de dados: 31
Autores: Alviola,   Pedro A., IV; Capps,   Oral, Jr.; Wu,   Ximing.
A censored Almost Ideal Demand System (AIDS) and a Quadratic Almost Ideal Demand System (QUAIDS) were estimated in modeling non-alcoholic beverages. Five estimation techniques were used, including the conventional Iterated Seemingly Unrelated Regression (ITSUR), two-stage methods such as the Heien and Wessells (1990) and the Shonkwiler and Yen (1999) approaches, the generalized maximum entropy method and the Amemiya-Tobin framework of Dong, Gould and Kaiser (2004). Our results based on various specifications and estimation techniques are quantitatively similar and indicate that price elasticity estimates have a greater variability in more highly censored non-alcoholic beverage items such as tea, coffee and bottled water as opposed to less censored...
Tipo: Conference Paper or Presentation
Palavras-chave: Censored demand systems; AIDS; QUAIDS; Two-Step Methods; Generalized Maximum Entropy; Amemiya-Tobin Framework; Non-Alcoholic Beverages; Agribusiness; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; C34; D12.
Ano: 2009
URL: http://purl.umn.edu/60462

Eating Out in the British Isles
Provedor de dados: 31
Autores: Keelan,   Conor D.; Henchion,   Maeve M.; Newman,   Carol F.
This paper presents a comparative analysis of the foodservice industries in both Ireland and the UK. Each industry is analysed separately using the most recently available Household Budget Survey datasets for Ireland and the most recent Expenditure and Food Datasets for the UK and is disaggregated into quick-service (fast food and takeaway) and full-service (hotel and restaurant meals), the two largest components of each industry. A double hurdle model, adjusted for misspecification, is used in this analysis. A number of variables affect both dependent variables in the same way, for example, income and age and the number of workers variable, but differences are apparent throughout the discussion. Perhaps the most interesting point to highlight is how...
Tipo: Conference Paper or Presentation
Palavras-chave: Food-Away-From-Home; Quick-service; Full-service; Double Hurdle Model; Box-Cox Transformation.; Food Consumption/Nutrition/Food Safety; D12; D13; C34; R2.
Ano: 2008
URL: http://purl.umn.edu/36859

Household food expenditures in the United States: A Bayesian MCMC approach to censored equation systems
Provedor de dados: 31
Autores: Kasteridis,   Panagiotis P.; Yen,   Steven T.
We apply a Bayesian Markov Chain Monte Carlo (MCMC) technique, along with data augmentation to accommodate censoring in the dependent variables, to the estimation of a large expenditure system of food expenditures. Our finding of significant error covariance estimates justifies estimation of the system in improving statistical efficiency. Income, household composition, regions and other socio-demographic variables are found to play significant roles in determining household food expenditures.
Tipo: Conference Paper or Presentation
Palavras-chave: Bayesian MCMC; Censored equation system; Consumer Expenditure Survey; Food Consumption/Nutrition/Food Safety; C11; C34; D12; C11; C34; D12.
Ano: 2010
URL: http://purl.umn.edu/61763

Children’s Consumption of Fruits and Vegetables: Do School Environment and Policies Affect Choice in School Meals?
Provedor de dados: 31
Autores: Ishdorj,   Ariun; Crepinsek,   Mary Kay; Jensen,   Helen H.
Considering most children spend a majority of their weekdays at school and, on average, obtain more than one-third of their daily caloric intake from meals consumed at school during the school year, school is a natural place to implement nutrition policies that would help develop healthy eating habits and improve health and well-being of children. At the same time, local school meal policies may influence what foods are offered and how the foods are prepared. In this regard, the U.S. Department of Agriculture’s (USDA) two school meal programs can play an important role in children’s diets and food habit formation and thus positively influence children’s health. The focus of our research is children’s intakes of fruits and vegetables by location of...
Tipo: Presentation
Palavras-chave: Food Assistance; Fruits and Vegetables; School Meals; Endogeneity; Censoring; Food Consumption/Nutrition/Food Safety; C11; C34; C36.
Ano: 2012
URL: http://purl.umn.edu/123534

U.S. Fluid Milk Demand: A Disaggregated Approach
Provedor de dados: 31
Autores: Davis,   Christopher G.; Dong,   Diansheng; Blayney,   Donald P.; Yen,   Steven T.; Stillman,   Richard.
The International Food and Agribusiness Management Review is published quarterly by IFAMA. www.ifama.org
Tipo: Article
Palavras-chave: Censored demand; Fluid milk; Nielsen Homescan; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Institutional and Behavioral Economics; Land Economics/Use; Productivity Analysis; Public Economics; C25; C34; D12.
Ano: 2012
URL: http://purl.umn.edu/120856

ESTIMATION OF CENSORED LA/AIDS MODEL WITH ENDOGENOUS UNIT VALUES
Provedor de dados: 31
Autores: Dong,   Diansheng; Kaiser,   Harry M.; Myrland,   Oystein.
In this study, we develop and estimate a censored LA/AIDS model using household-level purchase data. In addition to imposing non-negativitity constraints, we account for the endogeneity of unit value. We address the non-negativity issue using an Amemiya-Tobin approach, which imposes the adding-up condition on both observed and latent shares. We address the endogeneity of unit value by estimating share equations and unit value equations simultaneously. Given the need to evaluate high-order probability integrals, we use a simulated probability method in the model estimation. This model is applied to estimate and analyze a demand system featuring six fish and three meat commodities, using Norwegian household data.
Tipo: Technical Report
Palavras-chave: Demand and Price Analysis; Research Methods/ Statistical Methods; C34; D12.
Ano: 2003
URL: http://purl.umn.edu/122119

A double-hurdle model of Irish households' foodservice expenditure patterns
Provedor de dados: 31
Autores: Keelan,   Conor D.; Henchion,   Maeve M.; Newman,   Carol F.
The aim of this paper is to analyse the various factors fuelling demand for Food- Away - From- Home (FAFH) in Ireland. The two largest components of this industry, the quick- service sector (fast food and takeaway) and the full- service sector (hotel and restaurant meals), are analysed using the most recently available Household Budget Survey data for Ireland. The results from a Box- Cox double hurdle model indicate that different variables affect expenditure in the different sectors in different ways. Income has a greater effect on full- service expenditure than on quick- service. Similarly households that are healthconscious indicate a greater preference for full- service meals while households with higher time values indicate a greater preference for...
Tipo: Conference Paper or Presentation
Palavras-chave: Foodservice; Food- Away- From- Home; Quick- service; Fullservice; Food Consumption/Nutrition/Food Safety; D12; D13; C34; R2.
Ano: 2006
URL: http://purl.umn.edu/10083

Farm Income Variability and the Supply of Off-Farm Labor by Limited-Resource Farmers
Provedor de dados: 31
Autores: Vergara,   Oscar; Coble,   Keith H.; Patrick,   George F.; Knight,   Thomas O.; Baquet,   Alan E.
We study the relationship between the off-farm labor decision and the limited-resource farmers’ and spouses’ off-farm experience, education, and sources of income.  We found that farmers’ and spouses’ off-farm experience and wages are significant factors in explaining the off-farm labor supply decision.  Contrary to expectations, farm income variability is not significant in the farmers’ and spouses’ decision to see off-farm work.  The off-farm labor supply of farmers and their spouses is negatively correlated with income transfers from the government.  It was also found that the spouse is a residual supplier of on-farm and off-farm labor.
Tipo: Journal Article
Palavras-chave: Farm income variability; Limited-resource farmer; Off-farm work; Tobit regression; C34; D19; D81; J15; Q18.
Ano: 2004
URL: http://purl.umn.edu/43394

Economic Hysteresis in Variety Selection
Provedor de dados: 31
Autores: Richards,   Timothy J.; Green,   Gareth P.
Investing in a new perennial crop variety involves an irreversible commitment of capital and generates an uncertain return stream.  As a result, the decision to adopt a new variety includes a significant real option value.  Waiting for returns to rise above this real option causes a delay in adoption because of economic hysteresis.  This study tests for hysteresis in the adoption of wine grape varieties using a sample of district-level data from the state of California.  The empirical results show a significant hysteretic effect in wine grape investment, which might be reduced by activities that smooth earnings over time.
Tipo: Journal Article
Palavras-chave: California; Grapes; Hysteresis; Investment; Jump diffusion; Real options; Variety adoption; Wine; Q14; Q11; D92; C34.
Ano: 2003
URL: http://purl.umn.edu/37310

Does Farm Size Really Converge? The Role of Unobserved Farm Efficiency
Provedor de dados: 31
Autores: Dolev,   Yuval; Kimhi,   Ayal.
We analyze the growth of family farms in Israeli cooperative villages between 1981 and 1995, using longitudinal data. We use instrumental variables to account for the endogeneity of initial farm size, and correct for selectivity due to farm survival. We also include a technical efficiency index, derived from the estimation of a stochastic frontier production model, as an explanatory variable. We find that technical efficiency is an important determinant of farm growth, and that not controlling for technical efficiency could seriously bias the results. The size distribution of Israeli family farms is found to be mostly diverging, while without technical efficiency farm growth seemed to be predominantly random.
Tipo: Working or Discussion Paper
Palavras-chave: Farm size; Farm growth; Farm survival; Instrumental variables; Sample selection; Technical efficiency; Farm Management; Productivity Analysis; Q12; L25; C34.
Ano: 2008
URL: http://purl.umn.edu/45778

Effects of Traceability on the Italian Fresh Vegetables Market: A Demand System Simulation
Provedor de dados: 31
Autores: Caracciolo,   Francesco; Cembalo,   Luigi.
Traceability can serve various purposes in the food sector, including that of chain quality control. However, the aspects that seem to be most frequently required of traceability are those related to food safety. Nevertheless, traceability systems development has recently shifted its focus from the major aspects of food safety to a price premium search approach. Although such an approach often appears to lie behind production strategies, there is no technical or theoretical evidence to support it: traceability systems do not guarantee, per se, quality. On the other hand, a rigorous traceability system that pursues multiple objectives involves costly procedures that are very likely to feed all the way up to the consumer side. The mainstream literature is...
Tipo: Conference Paper or Presentation
Palavras-chave: Traceability; Early potato; Censored demand system estimation; Sample selection approach; Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics; Research Methods/ Statistical Methods; D12; C31; C34.
Ano: 2010
URL: http://purl.umn.edu/100503

ECONOMIC INCENTIVES FOR DIETARY IMPROVEMENT AMONG FOOD STAMP RECIPIENTS
Provedor de dados: 31
Autores: Lin,   Biing-Hwan; Yen,   Steven T.; Dong,   Diansheng; Smallwood,   David M.
Most Americans need to consume more fruits, vegetables, and dairy products. This need is particularly acute among low-income individuals. The objective of this study is to examine the cost effectiveness of two economic policies that use alternative policy levers available within the Supplemental Nutrition Assistance Program (formerly Food Stamp Program) to increase consumption of these under-consumed foods. Data from three nationally representative surveys are used to estimate demand elasticities, marginal propensity to spend on food out of food stamp benefits, and consumption amount of and spending on under-consumed foods among food stamp recipients. Results of the analyses suggest that a 10% price subsidy would curtail consumption deficiencies by 4–7% at...
Tipo: Conference Paper or Presentation
Palavras-chave: CEX; SNAP; Price subsidy; NHANES; NFSPS; Vegetables; Milk; Fruits; Food stamps; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Health Economics and Policy; C34; D12; Q18.
Ano: 2009
URL: http://purl.umn.edu/53339

The supermarket revolution and impacts on agricultural labor markets: Empirical evidence from Kenya
Provedor de dados: 31
Autores: Rao,   Elizaphan J.O.; Qaim,   Matin.
Many developing countries are currently experiencing a rapid expansion of supermarkets. New supermarket procurement systems could have important implications for farming and wider rural development. While previous studies have analyzed farm profit and income effects, possible employment effects have received much less attention. Building on data from a recent survey of vegetable farmers in Kenya, in this article a double-hurdle model of hired labor use is developed and estimated. Farmer participation in supermarket channels increases the likelihood of hiring labor by 13% and overall demand for hired labor by 38%. A gender disaggregation shows that positive employment effects are especially pronounced for female hired labor. Given that agricultural wage...
Tipo: Working or Discussion Paper
Palavras-chave: Supermarkets; Off-farm income; Hired labor; Double-hurdle model; Kenya; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Demand and Price Analysis; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Labor and Human Capital; Land Economics/Use; Livestock Production/Industries; Productivity Analysis; C34; Q12; Q13; J43.
Ano: 2011
URL: http://purl.umn.edu/107745