modeling aggregate manufactured exports for some asian newly industrialized economies a central question in studies of the asian newly industrialised economies has been whether the extremely rapid export growth of these countries can be viewed as primarily a phenomenon of income elastic export demand or of fast expanding export supply in the face of highly price elastic demand this paper provides evidence to show that while high income elasticities of export demand are detected using a conventional simultaneous model this may conceal the presence of important product differentiation and product innovation effects on export demand these are then captured using a measure of the total resource base copyright 1995 by mit press

the dynamics of individuals fat consumption consumers are increasingly aware of the link between their lifestyle choices and the risk of noncommunicable diseases a dynamic approach incorporating this linkage in food demand is developed where consumers maximize utility over time by choosing fat intake to control their cumulative fat level the resulting dynamic indirect utility function and household data on meat fish and dairy consumption are used to estimate a censored demand system results show that consumers consciously adjust but not instantaneously their cumulative fat level highly educated households have a faster rate of adjustment of cumulative fat when cumulative fat level increases consumers shift to dairy or white meat from red meat products

calories conflict and correlates redistributive food security in post conflict iraq war torn iraq manifests itself as an ideal laboratory for food policy experimentation due to availability of unique data surrounding intra household calorie consumption and the presence of selected correlates including but not restricted to substantial disruptions to social infrastructure and fundamental public policy intervention among other findings expenditure elasticities are mostly positive and dramatically curvilinear with respect to wealth and lump sum redistribution of the iraqi public distribution system emerges as a feasible policy intervention extensions are discussed

demand for rural tourism the effects of quality and information the development of rural tourism is regarded as a promising diversification strategy especially for lagging and mountainous areas of the european union research concerning the demand and or supply of rural tourism services has been limited within the agricultural economics domain despite the significance attached to rural tourism by various rural development policy measures and initiatives the article examines the expenditure behavior of rural tourists within a framework of demand for composite heterogeneous goods the proposed framework captures the quality of the tourism experience as the commodity s unit value a quantifiable economic variable examines its effects on expenditures and allows for the estimation of elasticity in prices regarding expenditure and quantity empirical analysis is facilitated by a survey recording the expenditure behavior of 465 tourists in two rural and lagging areas of greece the quality of the tourism experience is significantly and positively affected by the income the source from which information about the trip is retrieved internet newspapers as well as general press and special travel press and by the amount of information sought by the consumer prior to the trip in turn the quality of the tourism experience is the major endogenous factor that positively influences expenditures for rural tourism further research is needed before evidence provided in this work can be used to draw policy conclusions and recommendations

elicitation format and sensitivity to scope this paper undertakes a systematiccomparison of the contingent valuation cv andchoice experiments ce methods andinvestigates the extent to which either of themare affected by insensitivity to scope this isachieved by undertaking separate cv estimatesof willingness to pay for two nested publicgoods both of which are explicitly included ina parallel ce survey the results indicate thatce values exhibit greater sensitivity to scopethan cv values ce gives significantly largerresults than cv for the more inclusive publicgood and significantly smaller results for theless inclusive public good

giving stated preference respondents time to think results from four countries previous studies have found that contingent valuation cv respondents who are given overnight to reflect on a cv scenario have 30 40 lower average willingness to pay wtp than respondents who are interviewed in a single session this time to think ttt effect could explain much of the gap between real and hypothetical wtp observed in experimental studies yet giving time to think is still rare in binary or multinomial discrete choice studies we review the literature on increasing survey respondents opportunities to reflect on their answers and synthesize results from parallel ttt studies on private vaccine demand in four countries across all four countries we find robust and consistent evidence from both raw data and multivariate models for a ttt effect giving respondents overnight to think reduced the probability that a respondent said he or she would buy the hypothetical vaccines average wtp fell approximately 40 respondents with time to think were also more certain of their answers and a majority said they used the opportunity to consult with their spouse or family we conclude with a discussion of why researchers might be hesitant to adopt the ttt methodology

prices and quality effects in cross sectional demand analysis a conceptual clarification of the sources and meaning of cross sectional price variability is used to motivate a theoretical and econometric framework for the estimation of cross sectional demand functions quality effects are distinguished from supply related price variability to identify cross sectional demand for disaggregated food commodities an empirical application using data from the 1977 78 nationwide food consumption survey indicates that parameter differences resulting from a failure to adjust cross sectional prices for quality effects are likely to be small for relatively homogenous disaggregated food commodities in demand analysis with cross sectional household budget data it is usually assumed that prices are constant allen and bowley prais and houthakker george and king given this assumption engel functions are estimated where expenditure or quantity is regressed on income or total expenditures family size and other demographic characteristics the assumption that cross sectional price effects are absent or are captured adequately by spatial and temporal dummy variables has not been evaluated empirically whether cross sectional price effects can be treated in this manner has implications for the specification of cross sectional demand functions as well as the estimation of engel functions there is a considerable literature on estimating price elasticities with cross sectional data most of the applications utilize timeseries cross sectional data annual or quarterly household consumption surveys and

estimation of censored demand equations from large cross section data the article develops an alternative econometric methodology to estimate a system of censored demand equations using a large cross section data from colombian urban households the approach preserves the behavioralinformation expressed by zero expenditures and conforms with the requirements imposed by consumer theory in a way consistent with the random utility hypothesis we motivate the choice of the tobit modelas a statistical representation of consumer behavior and introduce the methodology by specifying the aids model modified according to both a translating and scaling demographic transformation we propose to estimate each demand equation in unrestricted form using the jackknife technique we then recover the demand parameters imposing the cross equations restrictions by using minimum distance estimation the empirical results of the censored demand system for specific households of policy relevance are reported copyright 2000 oxford university press

household composition and food expenditures a cross country comparison abstract in the analysis of food expenditures use of household member counts as an explanatory variable assumes each member has the same marginal food expenditure impact in our analysis of latin american food expenditures we reject this assumption via the estimation of endogenously determined adult equivalence scales that vary by household member gender and age a series of hypothesis tests indicate significant differences not only in the male versus female equivalence scales but also across country with the use of such equivalence scales in the definition of per capita expenditures we find significant differences in the distributions implying substantially different poverty rankings

food demand in mexico an application of the amemiya tobin approach to the estimation of a censored food system the modeling of micro level food demand patterns requires not only allowing for household heterogeneity but also addressing the problem of censoring in this article we present a variation of the amemiya tobin framework for estimating a censored demand system that allows for household heterogeneity the unique aspect of our approach is the use of a procedure that ensures the adding up of both latent and observed expenditure shares and also imposes expenditure share nonnegativity this system is applied to an analysis of food demand based on a random sample of urban mexican households

disaggregated household meat demand with censored data previous research on meat demand has generally used highly aggregated data across time products and consumers however meat products across species are likely stronger substitutes than some products from the same species further demand for specific meat products would be expected to respond differently to market information about food safety or other events this study uses monthly consumer panel data collected between 1992 and 2000 to estimate a disaggregated meat product demand system the use of the expectations maximization algorithm is introduced to estimate a demand system that adjusts for the econometric problem of censored data resulting from purchased shares of some products by individuals often being equal to zero results indicate that certain individual meat products have noticeably different own price elasticities than existing aggregate meat product estimates of their respective species some individual meat products have stronger substitutes across species than within species e g be

estimation of demand functions using cross sectional household data the problem revisited a procedure that corrects for selectivity bias is proposed to estimate demand functions using cross sectional data under the assumption that prices vary across households this procedure which extends the work by cox and wohlgenant includes a two equation system of expenditure and unit value functions this model is applied to household expenditures for beef steaks and roasts

estimating the private benefits of vaccination against cholera in beira mozambique a travel cost approach abstract this paper reports the results of the first study that estimates households private demand for cholera vaccines using the travel cost method we take advantage of an unusual natural experiment in january 2004 more than 41 000 residents from various locations in beira mozambique received two doses of oral cholera vaccine free of charge during the first vaccination trial to test its effectiveness in an endemic cholera zone of africa about 30 000 people participated from outside the target zone resulting in long queues and an average waiting time of about 85 min per dose we estimated travel cost models of the revealed demand for cholera vaccines among households informed of the trial using information collected in in person interviews conducted during the summer of 2005 to explore households participation in the trial we used standard and zero inflated household count models for all household members and dichotomous choice models for the head of the household our analysis shows that the quantity of vaccines obtained by households and the likelihood of participation decreased as travel cost in time and transport expenses rose our best estimates of per capita willingness to pay for the two required doses of cholera vaccine are about 0 85 usd these estimates are sensitive to the assumed value of time spent acquiring vaccines

applied welfare economics with discrete choice models economists have been paying increasing attention to the study of situations in which consumers face a discrete rather than a continuous set of choices such models are potentially very important in evaluating the impact of government programs upon consumer welfare but very little has been said in general regarding the tools of applied welfare economics indiscrete choice situations this paper shows how the conventional methods of applied welfare economics can be modified to handle such cases it focuses on the computation of the excess burden of taxation and the evaluation of quality change the results are applied to stochastic utility models including the popular cases of probit and logit analysis throughout the emphasis is on providing rigorous guidelines for carrying out applied work this abstract was borrowed from another version of this item

variation in retail costs for fresh vegetables and salty snacks across communities in the united states abstract households living in different communities pay different amounts of money for food food costs depend on whether a household lives in an urban community or in a locality with a high incidence of poverty among other factors this study focuses on spatial variation across the united states in the retail costs for fresh vegetables and salty snacks findings reveal that the major economic and demographic characteristics of a household s community affect its costs for these two types of foods differently however households are likely to pay more money for salty snacks in communities where fresh vegetables also cost more

the demand for a malaria vaccine evidence from ethiopia this study measures the monetary value households place on preventing malaria in tigray ethiopia we estimate a household demand function for a hypothetical malaria vaccine and compute the value of preventing malaria as the household s maximum willingness to pay to provide vaccines for all family members this is contrasted with the traditional costs of illness medical costs and lost productivity our results indicate that the value of preventing malaria with vaccines is about us 36 per household per year or about 15 of imputed annual household income this is on average about twice the expected household cost of illness

giving respondents time to think in contingent valuation studies a developing country application abstract this paper evaluates whether the time given people to think about their responses to cvm valuation questions influences their answers our study was conducted in nigeria as part of an evaluation of rural households willingness to pay for public taps and private connections to improved drinking water systems respondents who were allowed time to evaluate the proposed water system bid significantly less than those who did not have that time moreover this conclusion was upheld regardless of whether the water system was a public tap or a private connection

the demand for food quality in rural china many studies of food demand do not use actual prices but unit values obtained by dividing expenditures by the quantity consumed this can bias empirical analyses because unit values are not exogenous market prices they reflect household food quality choices within each food category this article develops a framework for assessing the resulting bias in income and price elasticities of demand and applies the framework to data for rural china empirical results indicate that households in rural china tend to consume higher quality food as income increases with a greater sensitivity to income for basic foods than for luxury foods copyright 2009 oxford university press

the truth the whole truth and nothing but the truth a multiple country test of an oath script hypothetical bias is one of the main issues bedeviling the field of nonmarket valuation the general criticism is that survey responses reflect how people would like to behave rather than how they actually behave in our study of climate change and carbon emissions reductions based on the increasing bulk of evidence from psychology and economics regarding the effects of making promises we investigate the effect of an oath script in a contingent valuation survey the survey was conducted in sweden and china and its results indicate that an oath script has significant effects on respondent behavior in answering willingness to pay wtp questions in both countries the shares of zero wtp responses and extremely high wtp responses decrease when an oath script is used resulting in lower variance furthermore the conditional wtp decreases in the chinese but not in the swedish sample we also find that the effect of the oath script is not generally dependent on respondent characteristics and the few differences we observe vary with the countries

do hypothetical and actual marginal willingness to pay differ in choice experiments application to the valuation of the environment abstract in this paper we test the validity of choice experiments with donations for environmental projects in particular we test whether or not there are differences in preferences between a hypothetical and an actual choice experiment our experiments indicate no differences in addition internal tests of validity indicate transitive and stable preferences in both experiments although there are some indications of possible learning effects during the experiment

an inverse demand analysis with introduction of quality effects an application to spanish consumption of fruit and vegetables this article analyzes consumer preference for fruit and vegetables when by using time series with socioeconomic characteristics of households there can be seemingly unobserved quality effects which are increased by aggregation the changes in spanish demand for fresh and processed fruit and vegetables over the period 1987 2000 are discussed following previous tests and analyses quantities are taken as predetermined and prices as matching the offer conditions thus quality effects based on the nutritional and or health value of the product are estimated from the error terms associated with the functions of the unit values quality variables are introduced as taste shifters in the inverse demand system laitinen theil model the results show the positive effects of quality differences on the normalized price for the group of products through own quality flexibilities and the negative effects between fresh and processed products through cross quality flexibilities

consistent estimation of censored demand systems using panel data we derive a joint continuous censored commodity demand system for panel data applications unobserved heterogeneity is controlled for using a correlated random effects specification and a generalized method of moments framework used to estimate the model while relatively small differences in elasticity estimates are found between a flexible random effects specification and one that restricts the random effect coefficient to be time invariant larger differences are observed when comparing the flexible model to a pooled cross sectional estimator the results suggest the limited ability of such estimators to control for preference heterogeneity and unit value endogeneity leads to parameter bias

using conjoint analysis to quantify public preferences over the environmental impacts of wind farms an example from spain this paper focuses on the effect on people s utility of the potential environmental impacts of wind farm developments we report on research designed to provide insight into their preferences and we show how two alternative choice modelling techniques can be used to estimate them our results show that significant social costs in the form of environmental impacts can be associated with wind farm developments as relative environmental values are revealed by these methods it would be possible to develop wind farms in such a way that minimises the total social costs of the investment and which maximises its net benefits

coupon redemption and its effect on household cheese purchases by endogenizing unit value and coupon redemption we estimate u s household cheese purchase quality choice and coupon redemption equations simultaneously zero purchases and missing values on coupons and unit values are taken into account in the model to correct for selectivity bias correlations among the three equations are found to be significant empirical findings show that high quality choice significantly decreases cheese purchases while cheese coupon usage significantly increases purchases we find that higher income households select higher quality cheese while larger households choose lower quality cheese for coupon redemption we find that african american and hispanic households redeem less while asian households have no significant difference compared to caucasian households

between economic loss and social identity the multi dimensional cost of avoiding deforestation in eastern madagascar this paper exhibits the multiple dimensions of the cost of stopping the main driver of deforestation in madagascar slash and burn agriculture tavy as well as being a major component of the economic livelihoods of most local households living at the edge of forests tavy has been described by anthropologists as an important cultural practice in this paper we show that stopping tavy does not only entail an economic cost for local households the loss of the cultural dimension of tavy would come at an additional cultural cost for some our results suggest that a viable cessation of deforestation in madagascar would require going beyond simple compensation of the opportunity costs of avoiding deforestation

quantity and quality effects of advertising a demand system approach quantity and quality effects of advertising are investigated in this article a censored demand system is estimated for fish beef pork and other meats using norwegian household data in the demand model generic fish advertising and meat advertising is introduced as demand shifters and at the same time unit values are treated as endogenous the unit values capture the quality of the commodities empirical findings show that advertising can have both quantity and quality effects on household demand

rethinking cholera and typhoid vaccination policies for the poor private demand in kolkata india summary the old familiar diseases of cholera and typhoid remain a serious health threat in many developing countries health policy analysts often argue that vaccination against cholera and typhoid should be provided free because poor people cannot afford to pay for such vaccines and because vaccination confers positive economic externalities on unvaccinated individuals in 2004 we conducted a contingent valuation cv survey of 835 randomly selected adults from two neighborhoods in kolkata india to provide information on private demand for cholera and typhoid vaccines for themselves and for household members to support more nuanced financial and economics analyses of such vaccination programs the median private economic benefits of providing a typhoid vaccine to a household with five members is about us 23 in a middle income neighborhood us 27 for a cholera vaccine and us 14 in a low income slum us 15 for a cholera vaccine our research raises an intriguing possibility if user charges were set at a level to recover the costs of a vaccination program there could be sufficient demand for the vaccine so that coverage of the vaccinated population might ensure that all the remaining unvaccinated individuals would be protected as well through indirect herd protection

reliability of stated preferences for cholera and typhoid vaccines with time to think in hue vietnam weexaminetheeffectofgivingrespondentstimetothinkabouttheirstatedchoices sc in a survey of cholera and typhoid vaccine preferences in hue vietnam because neither vaccine is widely available in vietnam we used the sc approach a stated preference technique and gave half of our respondents overnight to think about their choices to make the hypothetical valuation scenario as similar to a real life choice situation as possible respondents who were given extra time made fewer choices that violated internal validity tests of utility theory and had lower average willingness to pay wtp confirming a result found in similar studies in the contingent valuation literature jel d12 i18 c25

estimating food demand in paraguay from household survey data we estimate a food demand system in paraguay based on the 1997 national household survey considering 12 food categories to obtain demand elasticity estimates from household survey data accounting for quality effects measurement errors and censored observations price indexes are obtained from ordinary least squares predictions of changes in unitary values caused by spatial and temporal variations and the two step estimation procedure shonkwiler and yen 1999 is applied our approach yields reasonable estimates of combined quantity and quality responses with respect to price results suggest distinct consumption behavior in urban and rural areas particularly for chicken eggs dairy and fats and oils which are likely because of differences in the food distribution system and availability of nonmarket food sources

the influence of task complexity on consumer choice a latent class model of decision strategy switching the literature indicating that person context and task specific factors cause consumers to utilize different decision strategies has generally failed to affect the specification of choice models used by practitioners and academics alike who still tend to assume an utility maximizing omniscient indefatigable consumer this article 1 introduces decision strategy selection within a maintained compensatory framework into aggregate choice models via latent classes which arise because of task complexity 2 it demonstrates that within an experimental choice task the model reflects changing aggregate preferences as choice complexity changes and as the task progresses the import of these findings for current practice model interpretation and future research needs is examined

are fast responses more random testing the effect of response time on scale in an online choice experiment scepticism over stated preference surveys conducted online revolves around the concerns over professional respondents who might rush through the questionnaire without sufficiently considering the information provided to gain insight on the validity of this phenomenon and test the effect of response time on choice randomness this study makes use of a recently conducted choice experiment survey on ecological and amenity effects of an offshore windfarm in the uk the positive relationship between self rated and inferred attribute attendance and response time is taken as evidence for a link between response time and cognitive effort subsequently the generalised multinomial logit model is employed to test the effect of response time on scale which indicates the weight of the deterministic relative to the error component in the random utility model results show that longer response time increases scale i e decreases choice randomness this positive scale effect of response time is further found to be non linear and wear off at some point beyond which extreme response time decreases scale while response time does not systematically affect welfare estimates higher response time increases the precision of such estimates these effects persist when self reported choice certainty is controlled for implications of the results for online stated preference surveys and further research are discussed

adult equivalence scales and food expenditures an application to mexican beef and pork purchases in the analysis of food expenditures the use of a simple count of household members as an estimate of household size implicitly assumes each household member has the same marginal impact in this analysis of mexican food expenditures endogenously determined adult equivalence scales are estimated in such a way that these marginal impacts are allowed to vary by household member age and gender the results of a series of hypothesis tests indicate a rejection of the implied null hypothesis of equal marginal expenditure impacts associated with the use of the traditional count based household size variable this study also rejects the null hypothesis of the equality of adult equivalent scales across the commodities included in this analysis

the quantity and variety of households meat purchases a censored demand system approach this study investigates the demand for 10 disaggregated meat products by u s households a censored demand system which imposes budget constraints in both observed and latent shares is estimated along with a detailed explanation of the estimation procedure additional details about the methodology not provided in previous studies should help researchers to empirically apply the model an innovation of the study is to introduce the censored demand system model for studying the variety of a household s food purchases most households buy between seven and eight different products and hardly change the variety of their purchases with changes in meat expenditure

a comparison of stated preference methods for environmental valuation this paper presents an empirical comparison of contingent valuation cvm and choice experiments which are used to value environmental quality changes both of these methods require individuals to state their preferences for environmental qualities however choice experiments differ from cvm in that environmental attributes are varied in an experimental design which requires respondents to make repeated choices between bundles of attributes the empirical application involved the effect of environmental quality changes arising from forest management practices on recreational moose hunting values significant differences were found between the values derived from the two methods however detailed examination of the implied choice behaviour suggested that respondents ignored substitute recreation areas in the cvm question restricting the choice experiment model to consider only the one site where quality was varied resulted in welfare estimates similar to the cvm model this highlights the importance of substitutes in environmental valuation and suggests that choice experiments may be more appropriate than cvm in some cases