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| Registros recuperados: 12 | |
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| Halstead, John M.; Luloff, A.E.; Stevens, Thomas H.. |
| Protest bids are often excluded during analysis of contingent valuation method data. It is suggested that this procedure might introduce significant bias. Protest bids are often registered by respondents who may actually place a higher- or lower-than-average value on the commodity in question but refuse to pay on the basis of ethical or other reasons. Exclusion of protest bids may therefore bias willingness to pay (WTP) results, but the direction of bias is indeterminate a priori. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1992 |
URL: http://purl.umn.edu/29000 |
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| Stevens, Thomas H.; Blake, Martin J.; Williams, Lawrence G.. |
| This paper demonstrates the differences that result from estimating coal demand functions using highly aggregated regional data rather than less aggregated state data. At first glance the coal demand functions based on regional data appear to explain well and seem useful in policy making. However, coal demand functions based on state data show differences in the demand structure in each state of the region. Policy decisions that may seem appropriate based on aggregated regional data may have much different impacts on individual states in the region. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1979 |
URL: http://purl.umn.edu/32440 |
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| Samnaliev, Mihail; Stevens, Thomas H.; More, Thomas. |
| A field test of cheap talk and two types of certainty calibration in contingent valuation of public lands indicated that cheap talk does not reduce WTP estimates. Use of a ten point certainty calibration scale reduces WTP estimates by about half. However, adjusting for uncertainty using a 'Not Sure' option does not reduce WTP estimates but increases the variance in responses. There may be a conceptual difference between these two ways of accounting for respondents' uncertainty, which may suggest why they provide different WTP value estimates and variances. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/14517 |
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| Samnaliev, Mihail; Stevens, Thomas H.; More, Thomas. |
| Public recreation land management agencies have been searching for ways to increase revenue. User fees as implemented by the Fee Demonstration Program have received the most attention. Corporate sponsorships and private donations have also been implemented and other options, such as partial privatization, closure of some areas, and different forms of public-private partnerships have been debated. The present paper reports results from a 2002 mail survey of randomly selected Idaho and New Hampshire households, designed to elicit public attitudes about a wide variety of management policies for public (federal/state) recreation lands. The most socially acceptable forms for raising revenue were donation boxes (61.1%), corporate sponsorships for visitor centers... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land Economics/Use. |
| Ano: 2004 |
URL: http://purl.umn.edu/14530 |
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| Stevens, Thomas H.; Barrett, Christopher B.; Willis, Cleve E.. |
| Three conjoint models-a traditional ratings model, a ratings difference specification, and a binary response model-were used to value groundwater protection program alternatives. The last, which is virtually identical to a dichotomous choice contingent valuation specification, produced the smallest value estimates. This suggests that the conjoint model is very sensitive to model specifications and that traditional conjoint models may overestimate economic value because many respondents are not in the market for the commodity being valued. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1997 |
URL: http://purl.umn.edu/31562 |
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| Murphy, James J.; Stevens, Thomas H.. |
| Although the contingent valuation method has been widely used to value a diverse array of nonmarket environmental and natural resource commodities, recent empirical evidence suggests it may not accurately estimate real economic values. The hypothetical nature of environmental valuation surveys typically results in responses that are significantly greater than actual payments. Economists have had mixed success in developing techniques designed to control for this "hypothetical bias." This paper highlights the role of experimental economics in addressing hypothetical bias, and identifies a gap in the existing literature by focusing on the underlying causes of this bias. Most of the calibration techniques used today lack a theoretical justification, and... |
| Tipo: Journal Article |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/31262 |
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| Murphy, James J.; Allen, P. Geoffrey; Stevens, Thomas H.; Weatherhead, Darryl. |
| Individuals are widely believed to overstate their economic valuation of a good by a factor of two or three. This paper reports the results of a meta-analysis of hypothetical bias in 28 stated preference valuation studies that report monetary willingness-to-pay and that used the same mechanism for eliciting both hypothetical and actual values. The papers generated 83 observations with a median value of the ratio of hypothetical to actual value of 1.35, and the distribution has severe positive skewness. Since a comprehensive theory of hypothetical bias has not been developed, we use a set of explanatory variables based on issues that have been investigated in previous research. We find that a choice-based elicitation mechanism is important in reducing... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/14518 |
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| Registros recuperados: 12 | |
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