Effects of Disease Type and Latency on the Value of Mortality Risk

We evaluate the effects of disease type and latency on willingness to pay (WTP) to reduce environmental risks of chronic, degenerative disease. Using contingent-valuation data collected from approximately 1,200 respondents in Taiwan, we find that WTP declines with latency between exposure to environmental contaminants and manifestation of any resulting disease, at a 1.5 percent annual rate for a 20 year latency period. WTP to reduce the risk of cancer is estimated to be about one-third larger than WTP to reduce risk of a similar chronic, degenerative disease. The value of risk reduction also depends on the affected organ, environmental pathway, or payment mechanism: estimated WTP to reduce the risk of lung disease due to industrial air pollution is twice as large as WTP to reduce the risk of liver disease due to contaminated drinking water.     

A multilevel analysis of the determinants of willingness to pay to prevent environmental pollution across countries

This paper discusses the extent to which individual and contextual level factors influence the likelihood of individuals’ willingness to pay (WTP) to prevent environmental pollution. A multilevel probit regression framework was set up to explain WTP to prevent environmental pollution. We use data from the World Values Survey (WVS), which contains socio-economic and socio-demographic information, and merged it with country level covariates. Compared to many previous studies, our dataset encompasses a more indepth set of individual level covariates. We find that rich people, individuals with higher education, as well as those who possess post-materialist values are more likely to be concerned about environmental pollution. This study reveals that in developed countries, 90% of country variation in WTP to prevent environmental pollution can be explained by individual characteristics. This portion reduces to 80% in the case of developing countries. An interesting feature in our study is the ability to investigate the effect of contextual factors on individuals’ willingness to contribute for the environment. We observe that both democracy and government stability reduce individuals’ intention to donate to prevent environmental damage mainly in developed countries.     

Temptations and Dynamic Consistency

The objective of this article is to test a prediction of the quasi-hyperbolic model. The test is innovative in that it uses an experimental implementation in which there are two treatments: a forward market and a spot market. In each of these markets goods and activities are sold. The good and activities sold are investment goods or activities and temptation goods or activities. The prediction of the quasi-hyperbolic model is that in the spot (forward) market participants will buy more temptation (investment) goods and activities than in the forward market and less investment (temptation) good and activities. This prediction is not confirmed by the data, and hence is at odds with previous experiments which have shown support for the hyperbolic model. We speculate on the reasons for this.     

Elicitation of health values from mortality risk reduction

There are concerns regarding uncertainty about the accuracy of applying available empirical willingness-to-pay (WTP) estimates for reducing accidental deaths to value changes in risks of pollution-related deaths. In this study, we develop a theoretical model on defining WTP, and its determinants, and derive WTP estimates for changes in pollution-related mortality risks with varying morbidity and timing attributes. A survey is designed and conducted with 100 subjects. Each subject was to complete five choice sets and provided a range of implicit values of statistical life (VSL). The choices are estimated using the logit procedure. And, using the results of estimated multinomial logit model, the VSL is estimated to about $6.2 million.     

Individual and Household Values of Mortality Reductions with Intrahousehold Bargaining

I derive alternative measures of maximum willingness to pay (WTP) and value of statistical life (VSL) for selfish members of two-person households who bargain efficiently over consumption of individual and household goods. There is then no systematic bias in letting one member conduct the valuation on behalf of the household. Public-good VSL may exceed private-good VSL when each member attaches (selfish) preferences to survival of the spouse, and to any income from a surviving spouse in period 2. When period 2 is a retirement period and household members’ incomes are fixed, interview surveys tend to overvalue VSL due to ignored negative effects of own survival on private of public pension budgets.JEL Classification: I12, G22, J17     

Determinants of stated willingness to pay for public goods: A study in the headline method

Respondents were shown brief statements (“headlines”) referring to various threats to the environment or to public health, and other public issues. An intervention to deal with each problem was also introduced by a single sentence. Some respondents were asked to indicate their willingness to pay for the interventions by voluntary contributions. Others indicated their opinion of the intervention on a conventional rating scale, rated the personal satisfaction of contributing to it, or rated the importance of the problem. Group averages of these response measures were obtained for a large set of issues. Computed over issues, the rank-order correlations between the different measures were very high, suggesting that group averages of WTP and of other opinion statements are measures of the same public attitudes. Observed preference reversals and violations of monotonicity in contributions are better explained by a concept of attitude than by the notion of economic value that underlies the contingent valuation method. Contributions and purchases do not follow the same logic. Possible implications for the contingent valuation method are discussed.     

Impression management pressures on racial attitude surveys

For decades, researchers have expressed concern that self-report racial attitude measures are vulnerable to distortion from pressures respondents feel to present themselves as unprejudiced. A common response to this problem is to measure social desirability separately from racial attitudes and control for its variance in statistical analyses. The present study is designed to test whether such controls are sufficient. Participants rated items from both racial attitude and social desirability scales in terms of the amount of pressure they would feel to respond in a particular way regardless of their true attitudes. Participants report significantly greater response pressure on racial attitude items than on social desirability items, and ratings on the two types of items have only moderately shared variance. Implications for controlling social desirability in racial attitude research are discussed.     

小组工作方法介入大学生环境教育的策略研究

为了解大学生的环境意识和环保行为状况,本研究对苏州大学独墅湖校区本科生进行抽样调查,发现当代大学生环境意识和环保行为都有较大的提升空间,但它们之间存在一定程度的断裂。根据大学生的环境意识和环保行为特征,本研究划分出三种主要类型的群体,分别设计出"合作性"、"沟通型"和"辩论型"三种介入策略,并结合不同的小组工作模式,培养和提高大学生的环保素质。     

Operationalizing the Construct of Friendship among Children: A Psychometric Comparison of Sociometric-Based Definitional Methodologies

Peer relations researchers generally agree that friendship involves a close, mutual, dyadic relationship. However, the lack of consensus on how to operationalize this construct has limited our understanding of the role of friendship in social adjustment. The present study directly compared the psychometric properties (i.e., number of friendships identified, concordances, and stability) of the five major different definitions of friendship used in the literature. Fourth- and fifth-grade students (N = 90) completed a battery of sociometric measures at two different times separated by eight weeks. Friendship dyads were then identified using the following definitional criteria: (1) mutual positive nominations; (2) mutal high ratings (i.e., 4 or 5 on a five-point Likert-type scale); (3) one positive nomination reciprocated by a rating of 5; (4) one positive nomination and mutual high ratings; and (5) one positive nomination and mutual ratings averaging at least 4. Frequency and concordance analyses indicated differences across the five definitions. In addition, the friendships identified by each of the five definitions were similarly moderate in their stability. Explanations for, and the possible implications of, these differences are discussed.     

Reference points,loss aversion,and contingent values for auto safety

This article is concerned with the possible role of reference points and loss aversion (as suggested by prospect theory) in subjects' judgments about the value of increments and decrements in automobile safety. The contingent valuation method is employed in two experiments, both of which consider subjects' willingness-to-pay (WTP) for increased safety and compensation demanded (CD) for decreased safety in hypothetical new vehicle purchases. The results establish that disparities exist in subjects' WTP and CD values for the same increment of auto safety, even for a close-to-market context such as hypothetical new vehicle purchases. The results also indicate that evaluations can be manipulated by changing the perception of the reference point: losses can be recast as forgone gains and forgone gains as losses, altering (or even eliminating) differences between WTP and CD values.I would like to thank Mark Kamlet, Greg Fischer, and Granger Morgan for advice and help in structuring the research for the first experiment; Paul Slovic and Jack Knetsch for suggestions regarding the structure and content of the second experiment; Robin Gregory and two anonymous referees for insightful comments on earlier drafts; and the subjects who provided their time in the two experiments. Michael McNickle provided able research assistance for the second experiment. The survey for the first experiment was partially supported by the Program for Technology and Society at Carnegie Mellon University, with funds from the Andrew W. Mellon Foundation.     

Willingness to Pay for Risk Reduction and Risk Aversion without the Expected Utility Assumption

By means of minimal assumptions on the individual preferences, I show that the Willingness To Pay (WTP) for both a FSD and SSD reduction of risk is the sum of a mean effect, a pure risk effect and a wealth effect. As a result, the WTP of a risk-averse decision maker may be lower than the WTP of a risk-neutral one, for a large class of individual preferences’ representation and a large class of risks.     

Willingness to Pay for Health Protection: Inadequate Sensitivity to Probability?

Efficient investments in health protection require valid estimates of the public's willingness to forgo consumption for diminished probabilities of death, injury, and disease. Stated valuations of risk reduction are not valid measures of economic preference if the valuations are insensitive to probability variation. This article reviews the existing literature on CV studies of reductions in health risk and finds that most studies are poorly designed to assess the sensitivity of stated valuations to changes in risk magnitude. Replication of a recent study published in this journal by Johannesson et al. (1997) demonstrates how serious the problem of insensitivity can be, even for a study that reports plausible results. New empirical results are presented from telephone surveys designed to provide internal and external tests of how WTP responds to size of risk reduction. The effect of variations in instrument design on estimated sensitivity to magnitude is examined. Overall, estimated WTP for risk reduction is inadequately sensitive to the difference in probability, that is, the magnitude of the difference in WTP for different reductions in risk is typically smaller than suggested by standard economic theory. Additional research to improve methods for communicating changes in risk is needed, and future studies of stated WTP to reduce risk should include rigorous validity checks.     

The Effect of Environmental Disclosure Requirements on Willingness to Pay for Residential Properties in Borderlands Community*

Objective. This study examines the effect of environmental information disclosure requirements on future real estate transactions. The setting involves pollution from a concrete products and quarrying site near a largely Hispanic, residential community. Methods. The survey‐based contingent valuation (CV) method is used to test the hypothesis that a split‐sample treatment for an information disclosure requirement with a potentially negative affective quality will reduce the willingness to pay (WTP) of potential buyers for a typical property. Results. Results indicate that the information disclosure treatment reduces WTP, and that this effect is significantly exacerbated when the surveys are conducted in Spanish. Conclusions. In addition to identifying significant reductions in the WTP of potential home buyers, our findings demonstrate the importance of cultural and regional considerations for how information disclosure requirements are conducted in real estate transactions. Future CV studies should also consider Spanish‐language options in applications involving significant Hispanic populations.     

Scope insensitivity in health risk reduction studies: A comparison of choice experiments and the contingent valuation method for valuing safer food

Scope insensitivity and embedding are fundamental concerns in contingent valuation studies for health risk reductions. Recently, choice experiments have increasingly been used to obtain contingent willingness to pay (WTP) estimates. We juxtapose the WTP estimates of a choice experiment (CE) to those of the contingent valuation method (CVM) for different health risk reductions and compare them in the extent of scope insensitivity and embedding. WTP using CVM is scope sensitive for single health risks, but embedding is observed for multiple disease risks. In contrast, WTP based on the CE is highly scope sensitive and convex in risk reduction levels.

The value of private safety versus the value of public safety

In this study, one group of respondents is offered to purchase a safety device to be installed in their cars, while another group is offered a public safety program (improved road quality) which results in the same size risk reduction. In terms of the value of a statistical life, our results are very reasonable. However, the WTP for the private safety device ishigher than the WTP for the public safety measure. Drawing on a model developed by Jones-Lee (1991), we show that some types of altruists may, but need not, be willing to pay more for a private risk reduction than for a uniform risk reduction of the same magnitude. Still, our empirical results are surprising, and further empirical research seems warranted.     

Valuing fatal risks to children and adults: Effects of disease,latency, and risk aversion

We examine heterogeneity of willingness to pay (WTP) to reduce risks of fatal disease and trauma to adults and children. Using a stated-preference survey fielded to a large, nationally representative internet panel, we find that WTP to reduce fatal-disease risks (caused by consuming pesticide residues on foods) are similar for several types of cancer and non-cancer diseases and similar to WTP to reduce motor-vehicle crashes. WTP to reduce risk to one’s child is uniformly larger than to reduce risk to another adult or to oneself. Estimated values per statistical life are $6–10 million for adults and $6–10 million for adults and 12–15 million for children.     

Precautionary behavior and willingness to pay for a mortality risk reduction: Searching for the expected relationship

This paper examines within-sample correlation between six different precautionary behaviors and stated willingness to pay for a mortality risk reduction. The paper also shows estimates of the value of a statistical life based on seat belt and bicycle helmet use as well as based on the stated willingness to pay for a risk reduction in traffic mortality. Contrary to the theoretical expectations, no correlation is found between precautionary behavior and stated willingness to pay. One major explanation is that females and the elderly take more precaution, but state a lower WTP for a risk reduction. The estimates of VSL from the different approaches are $11.0 million, $5.0 million and $2.8 million from stated WTP, bicycle helmet use and seat belt use, respectively.

The Malleability of Environmentalism

In this article, we predict and find that self-perceptions of environmentalism are changed by subtle manipulations of context and, in turn, affect environmental behavior. In Study 1, we found that people exhibit greater positive assessments of their environmental behaviors (1) in the context of denying harm to the environment than in the context of claiming to help the environment, and (2) in situations where behaviors are evaluated subjectively than in situations where behaviors are evaluated more objectively. In Study 2, we explored the relationship between self-perceptions of environmentalism and environmental behaviors. Our data suggest that environmentally friendly behaviors may be promoted by leading people to perceive themselves as good environmentalists.     

Consumption and poverty in the homes of the English poor,c. 1670–1834

The consumer behaviour of the poor in the long eighteenth century has attracted more historical attention in recent years. Yet, we have little understanding of whether regional factors affected consumption or how the poor’s ownership of household goods was influenced by level of poverty and the life-cycle. By focusing on Kent and drawing comparisons to other counties, this article argues that the material lives of the poor were improving by the late eighteenth century, but finds that there were distinct regional differences as the poor acquired more and better goods in London and the Home Counties than in relatively remote areas. Moreover, by using pauper inventories and labourers’ probate inventories, the research finds that the poor were not a homogeneous group with similar levels of material wealth, but should be considered in terms of different subgroups which often led very different material lives to one another due to life-cycle-related problems including sickness and old age. Labourers’ probate inventories are found to represent a minority of the poor who were materially richer than most, whilst pauper inventories appear to represent a more typical subgroup of the poor that struggled to make do and owned most types of goods in smaller numbers.     

双薪家庭的家务性别分工：经济依赖、性别观念或情感表达

基于２０１０年第三期中国妇女地位调查数据的分析显示,城镇家庭的家务劳动分工具有“女性为主,男性为辅”的特征。研究表明,经济依赖关系、工作时间、性别角色观念均显著地影响着两性的家务分工,但其影响机制存在差别。对于男性而言,经济上的独立与成就对于其家务劳动投入的影响最大,其次是工作时间与性别角色观念,这些要素均相对独立地发挥作用,男性家务劳动的承担不存在“性别表演”。对于女性而言,纯粹的经济独立（对配偶收入的依赖程度、本人的绝对收入状况等）并非其家务劳动投入的最好预测,性别角色观念也不独立地对家务劳动参与产生影响。部分女性的家务劳动在经济依赖与性别角色观念交互影响下存在着形态与效应各异的“性别表演”。这一特征揭示了两性在劳动力市场中的经济地位与社会文化期待交互影响的形塑作用。