SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Rickertsen, Kyrre; Tegene, Abebayehu; Huffman, Sonya Kostova; Huffman, Wallace E..

Replaced with revised version of paper 11/29/06.

Tipo: Working or Discussion Paper

Palavras-chave: Health Economics and Policy.

Ano: 2006

URL: http://purl.umn.edu/18211

The Economics of Obesity-Related Mortality among High Income Countries

Huffman, Wallace E.; Huffman, Sonya Kostova; Tegene, Abebayehu; Rickertsen, Kyrre.

The high and rapidly rising adult obesity rates in the United States, United Kingdom, Australia and New Zealand are associated with major health risks, including cardiovascular disease, diabetes, stroke, and some forms of cancer; large health care costs; and premature deaths annually. For example, the death rate from diabetes mellitus has been rising in the U.S. In contrast, death rates from circulator diseases have a strong negative trend, but rising obesity rates almost certainly have slowed this trend. This paper focuses on obesity-related mortality from diabetes and circulatory diseases and establishes the econometric underpinning of an aggregate household health production function and an aggregate household health supply function using data for 15...

Highgrading in Quota Regulated Fisheries: Evidence from the Icelandic Cod Fishery

Palavras-chave: Health; Over nutrition; Obesity; Obesity-related mortality; High income countries; Economic factors; Household models; Food prices; Health Economics and Policy.

Ano: 2006

URL: http://purl.umn.edu/25567

Kristofersson, Dadi; Rickertsen, Kyrre.

A theoretical model with nonlinear discarding costs is constructed to describe highgrading in a fishery with an Individual Transferable Quota (ITQ) program. The model shows that ITQs provide incentives to discard fish when the hold capacity of the vessel is nonbinding. An empirical model is developed to test for highgrading and to predict the discarded quantities of different grades of fish. This model is applied to the Icelandic ITQ-regulated cod fishery. Net and long-line vessels are involved in highgrading and the quota price induces highgrading for net vessels. The predicted total discarded quantities are 4.7% and 2.7% of total landings for net and long-line vessels, respectively. Long-line and net vessels are predicted to discard 18% and 76% of...

EFFICIENT ESTIMATION OF HEDONIC INVERSE INPUT DEMAND SYSTEMS

Palavras-chave: Resource /Energy Economics and Policy.

Ano: 2005

URL: http://purl.umn.edu/19330

Kristofersson, Dadi; Rickertsen, Kyrre.

The paper is concerned with efficient estimation of characteristics demand. We derive and estimate an inverse input demand system for quality characteristics by using 172,946 observations over 881 trading days in the Icelandic fish auctions. An improved estimation method based on an expanded random coefficient model is suggested as an alternative to the currently used two-stage method of Brown and Rosen (1982). The estimates demonstrate the improved efficiency of the suggested method. A number of empirical results emerge, including a general increase in the demand for quality.

SC-X: CALIBRATING STATED CHOICE SURVEYS WITH EXPERIMENTAL AUCTION MARKETS

Palavras-chave: Demand and Price Analysis; C51; Q22..

Ano: 2003

URL: http://purl.umn.edu/21926

Alfnes, Frode; Rickertsen, Kyrre.

Experimental auctions (X) use real economic incentives but are limited by available products and locally recruited samples. Stated choice (SC) surveys can use a representative sample to estimate the willingness to pay (WTP) for hypothetical products with unavailable characteristics. However, a number of studies conclude that surveys give biased WTP estimates. We designed a method, SC-X, to calibrate the WTP estimates from stated choice surveys with WTP observed in experimental auctions. This method allows us to extend the results from auctions to products with unavailable characteristics and to socioeconomic groups not included in the auction. The SC-X method is illustrated using Norwegian consumers' preferences for country-of-origin and hormone...

SC-X: CALIBRATING STATED CHOICE SURVEYS WITH EXPERIMENTAL AUCTION MARKETS

Palavras-chave: Institutional and Behavioral Economics; Marketing.

Ano: 2003

URL: http://purl.umn.edu/25814

Alfnes, Frode; Rickertsen, Kyrre.

FOR WHOM REDUCED PRICES COUNT: A CENSORED QUANTILE REGRESSION ANALYSIS OF VEGETABLE DEMAND

Palavras-chave: Agribusiness.

Ano: 2003

URL: http://purl.umn.edu/21962

Low consumption of vegetables is linked to many diseases. From a health perspective, the distribution of consumption is at least as important as mean consumption. We investigated the differential effects of policy changes on high- and low-consuming households by using 15,700 observations from 1986 to 1997. Many households did not purchase vegetables during the two-week survey periods and censored as well as ordinary quantile regressions were estimated. Removal of the value added tax for vegetables, income increases, and health information are unlikely to substantially increase purchases in low-consuming households. Nevertheless, information provision is cheap and best targeted at low-consuming households.

Censored Quantile Regression and Purchases of Ice Cream

Palavras-chave: Food Consumption/Nutrition/Food Safety.

Ano: 2004

URL: http://purl.umn.edu/20172

Gustavsen, Geir Waehler; Jolliffe, Dean; Rickertsen, Kyrre.

The effects on purchases of ice cream of increasing the value added tax (VAT) for less healthy foods and removing the VAT for healthy foods are estimated. The effects on high- and low-purchasing households are estimated by using quantile regressions. Many households did not purchase ice cream and censored quantile regressions are estimated by a recently developed algorithm, which is simple, robust, and performs well near the censoring point. High-purchasing households will reduce their annual per capita purchases with 1.8 kilograms corresponding to an annual reduction of more than half a kilogram of body weight.

Inequality in Health Versus Inequality in Lifestyles

Palavras-chave: Censored quantile regression; Ice cream; Obesity; Purchase; Taxes; Food Consumption/Nutrition/Food Safety; Research Methods/ Statistical Methods.

Ano: 2008

URL: http://purl.umn.edu/6534

Ovrum, Arnstein; Rickertsen, Kyrre.

This paper uses repeated cross section data from Norway to compare patterns of inequality in self assessed health and obesity with patterns of inequality in underlying lifestyles central to the production of good health, namely physical activity, non-smoking and diet quality, represented by fish and fruits and vegetables consumption. We estimate a multivariate probit model to study correlates of these lifestyle and health variables, while Gini and concentration indices are being decomposed to identify sources of inequality. Results point towards considerable heterogeneity across the different lifestyle and health variables. Thus, patterns of inequality in health outcomes are not necessarily representative of patterns of inequality in their underlying...

Experimental Evidence of Risk Aversion in Consumer Markets: The Case of Beef Tenderness

Palavras-chave: Health Economics and Policy.

Ano: 2011

URL: http://purl.umn.edu/114556

Alfnes, Frode; Rickertsen, Kyrre; Ueland, Oydis.

Consistency of quality is important for brand loyalty and market share in consumer markets. Among consumers of beef, tenderness is the primary quality attribute. We use an experimental auction market to investigate how inconsistency in tenderness affects consumers willingness to pay (WTP) for beef. We find that both the level and the spread of tenderness affect consumers WTP for beef. Categorization the beef into various classes of tenderness increased the total value of the beef by 8%, which suggests that improved tenderness labeling may be a profitable strategy.

Consumer Cohorts and Milk Purchases

Palavras-chave: Beef tenderness; Consumer demand; Experimental auction; Marketing; Risk aversion; Consumer/Household Economics; C91; D12; D8; Q13.

Ano: 2005

URL: http://purl.umn.edu/24553

Fluid milk is the most important product of Norwegian agriculture, and the decline in milk purchase has impact in many rural communities. By decomposing the milk purchase into cohort effects, age effects and year effects we show that the reason for the decline is that older generations purchase more milk than younger generations, and during lifetime consumption decline with age. Consequently, as younger generations replace older generations milk purchase decline. We show that towards 2021 the milk purchase will continue to fall.

Public Policies and the Demand for Vegetables

Palavras-chave: Milk; Purchases; Cohorts; Food Consumption/Nutrition/Food Safety.

Ano: 2008

URL: http://purl.umn.edu/43551

Increased consumption of vegetables may reduce obesity and the prevalence of cardiac diseases and cancer. Norwegians consume less vegetables than nutrition experts recommend and the per capita consumption is lower than in most European countries. To investigate the causes of low consumption, a two-step approach is used to estimate the demand segmented by nine different household types. In the first step, a probit model is estimated to investigate the decision whether to purchase traditional vegetables, salad vegetables, and industrially processed vegetables. Conditional on purchase, an almost ideal demand model is used to model how much to purchase. The own-price elasticities and total expenditure elasticities are high for traditional and industrially...

Experimental Evidence of Risk Aversion in Consumer Markets: The Case of Beef Tenderness

Palavras-chave: Vegetables; Demand; Segmentation; Household types; Policies; Demand and Price Analysis.

Ano: 2002

URL: http://purl.umn.edu/24885

Alfnes, Frode; Rickertsen, Kyrre; Ueland, Oydis.

We use an experimental auction market to investigate how inconsistency in tenderness affects consumers' WTP for beef. We find that both the level and the spread of tenderness affect consumers' WTP. Categorization the beef into various classes of tenderness increased the total value of the beef by 8%.

High-Grading in a Quota-Regulated Fishery, with Empirical Evidence from the Icelandic Cod Fishery

Palavras-chave: Consumer/Household Economics.

Ano: 2005

URL: http://purl.umn.edu/19285

Kristofersson, Dadi; Rickertsen, Kyrre.

Fishers in quota-regulated fisheries find it to their advantage to discard less valuable fish at sea to increase the value of their catch. A theoretical model describing the high-grading behavior of fishers is presented, and an empirical model is derived as well as a testing strategy to test for high-grading and to estimate the discarded amount of each grade. The model is applied to data for the Icelandic quota regulated cod fishery during the period September 1998 to June 2001. The results indicate that highgrading occurs in the Icelandic cod fishery for both long-line and net vessels. However, the discard rates are small, and the results clearly suggest that the ban on discards in Iceland has effectively dealt with high-grading. The estimated discard...

Unstable Individual Bids and Stable Market Demand

Palavras-chave: ITQ's; Highgrading; Empirical estimation; Resource /Energy Economics and Policy; Q21; Q22; C12.

Ano: 2005

URL: http://purl.umn.edu/24722

Alfnes, Frode; Rickertsen, Kyrre; Shogren, Jason F..

We explore preference stability at the individual and market level. We examine individual bidding behavior among 116 French consumers who participated in experimental auctions conducted seven months apart for five types of fish. We reject preference stability at the individual level, but not at the aggregate market level.

Consumer Cohorts and Demand Systems

Palavras-chave: Aggregation; Consumer preferences; Demand; Experimental auctions; Food choice; Marketing; C91; D12; Q13.

Ano: 2011

URL: http://purl.umn.edu/114219

The Norwegian purchases pattern of non-alcoholic beverages has changed substantially. The observed changes cannot be fully explained by changes in relative prices and income, and other variables are likely to be important. Cohort variables have not been given much attention in demand analysis. Our main contribution is to include age, period, and cohort (APC) variables into a demand system. The system is applied to purchases of non-alcoholic beverages. Wald tests show the importance of including APC variables. A Monte-Carlo analysis shows how replacing the APC variables with an age and a trend variable results in misleading age effects on milk purchases.

Unstable Individual Preferences and Stable Aggregate Demand: French Consumers’ Willingness to Pay for Farmed and Wild Cod

Palavras-chave: Cohort effects; Demand system; Milk; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; D12; J10; Q13.

Ano: 2009

URL: http://purl.umn.edu/51566

Alfnes, Frode; Rickertsen, Kyrre.

We use panel data from two experiments conducted five months a part to investigate the stability of individual preferences and aggregate demand for five types of fish. Even though the bids in the two experiments are positively correlated, they clearly suggest that the individual preferences are unstable. This may be explained by internal desire for variety or by external effects such as new relevant information, seasonality in preferences, changes in the quality of the fish, and changes in the market price of fish. However, the aggregate demand curves of the participants are stable when we control for changes in the perceived quality of the fish and price expectations of the participants. In other words, the stability is generated by aggregation rather...