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| Registros recuperados: 17 | |
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| Shonkwiler, John Scott; Shaw, W. Douglass. |
| When a sample of recreators is drawn from the general population using a survey, many in the sample will not recreate at a recreation site of interest. This study focuses on nonparticipation in recreation demand modeling and the use of modified count-data models. We clarify the meaning of the single-hurdle Poisson (SHP) model and derive the double-hurdle Poisson (DHP) model. The latter is contrasted with the SHP and we show the DHP is consistent with Johnson and Kotz's zero-modified Poisson model. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/31027 |
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| Cerroni, Simone; Notaro, Sandra; Shaw, W. Douglass. |
| The validity of risk estimates elicited through the Exchangeability Method (EM) has been theoretically questioned because the use of chained questions may undermine the incentive compatibility of the game even when subjects are rewarded with real monetary incentives. In this paper, we examine the validity of stated risks elicited via the EM by using a laboratory experiment. The risk under study is the presence of pesticide residues in apples. Taking inspiration from the de Finetti’s notion of coherence, we consider risk measures as valid if and only if they obey all axioms and theorems of probability theory. Our experiment consists of four treatments: in the first, subjects are provided with real monetary incentives, but in the second, they are not. Each... |
| Tipo: Presentation |
Palavras-chave: Food Consumption/Nutrition/Food Safety. |
| Ano: 2012 |
URL: http://purl.umn.edu/124100 |
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| Cameron, Trudy Ann; Shaw, W. Douglass; Ragland, Shannon E.; Callaway, J. Mac; Keefe, Sally. |
| A model of recreation demand is developed to determine the role of water levels in determining participation at and frequency of trips taken to various federal reservoirs and rivers in the Columbia River Basin. Contingent behavior data are required to break the near-perfect multicollinearities among water levels at some waters. We combine demand data for each survey respondent at different levels of time aggregation (summer months, rest of year, and annual), and our empirical models accommodate the natural heteroskedasticity that results. Our empirical results show it to be quite important to control carefully for survey nonresponse bias. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/30996 |
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| Shaw, W. Douglass; Jakus, Paul M.. |
| In this paper we estimate the demand for rock climbing and calculate welfare measures for changing access to a number of climbs at a climbing area. In addition to the novel recreation application, we extend the travel cost methodology by combining the double hurdle count data model (DH) with a multinomial logit model of site-choice. The combined model allows us simultaneously to explain the decision to participate and to allocate trips among sites. The application is to climbers who visit one of the premiere rock-climbing areas in the northeastern United States and its important substitute sites. We also estimate a conventional welfare measure, which is the maximum WTP to avoid loss of access to the climbing site. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/31408 |
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| Lambert, David K.; Shaw, W. Douglass. |
| Nevada ranks third in the world in gold production. In order to operate the massive open pit gold mines, the State of Nevada granted mining companies a temporary permit to pump groundwater from near the open pits and dispose of it. Certain instream flows have nearly doubled relative to average historical flows in recent years. Following pit closure, surface flows will likely decline from historical levels. This study measures the impacts of these changing water supplies on downstream agricultural and recreational users. We argue that the creation of temporary changes in water rights for the downstream users would likely mitigate future losses both groups are expected to experience. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2000 |
URL: http://purl.umn.edu/30905 |
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| Jakus, Paul M.; Shaw, W. Douglass. |
| This study improves upon the standard "dummy variable" approach to modeling fish consumption advisories by jointly estimating a "perceived hazard" model and a site choice model. The perceived hazard model overcomes the shortcomings of the dummy variable model, namely that all anglers respond equally to advisories and that all anglers know of and believe the advisories. We find that anglers' perceived hazards associated with consumption advisories do affect product (recreational site) choice. Anglers' perceptions also affect welfare measures, where the benefits of contaminant removal follow a more reasonable pattern than that of the dummy variable approach. The joint perceived hazard/product choice model is applicable to a wide variety of risky choices... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2001 |
URL: http://purl.umn.edu/20772 |
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| Riddel, Mary C.; Shaw, W. Douglass. |
| We devise a simple model of intergenerational altruism under uncertainty. We present an estimable form of the model that relies on a few, plausible, assumptions. We apply the model to data collected in a survey of Southern Nevadans concerning the proposed Yucca Mountain Nuclear Waste Repository in Nye County, NV. We find strong evidence of a bequest motive. Approximately one third of the option wealth lost by households near the repository can be attributed to costs to future generations. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/19662 |
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| Cai, Yongxia; Shaw, W. Douglass; Wu, Ximing. |
| Self protection and altruism are crucial behavioral factors in determining the effectiveness of public policies aimed to improve human health from environmental hazards. This paper examined people’s arsenic mortality risk perception in the drinking water for themselves and their children using the Bayesian learning framework. A two-stage structural model within the random utility framework was developed to model the household’s risk averting behavior with respect to arsenic-related mortality risk. The empirical results indicate that parents engage in a form of mixed altruism. Parents are willing to spend more to make a trade-off between their risk and their children’s risk. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy; Risk and Uncertainty. |
| Ano: 2008 |
URL: http://purl.umn.edu/6149 |
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| Benson, Marnee; Walker, Mark; Shaw, W. Douglass. |
| Churchill County, Nevada had approximately 23,000 residents, with an estimated 13,500 who relied on private wells for water supply in 2002. This study examined exposure to arsenic in water supplies among residents with private domestic wells and factors related to householder choice to consume tap water. It compared opinions and concerns about water quality with consumption habits and observed concentrations from tap water samples. The results from 351 households indicated that a majority (75%) of respondents consumed tap water and that a minority (38%) applied treatment. Approximately 66% of those who consumed tap water were exposed to concentrations of arsenic that exceeded 10 ppb. Water consumption was related to application of treatment. Among 98... |
| Tipo: Report |
Palavras-chave: Health Economics and Policy; Resource /Energy Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/23963 |
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| Nayga, Rodolfo M., Jr.; Shaw, W. Douglass; Silva, Andres. |
| We examine how people might evaluate a product with novel attribute, given various kinds of risk information. Using a product with healthful benefits, we assess subjects' willingness to pay given various kinds of health risk information conveying reduced health risks, life tradeoffs, and ambiguity. Four treatments in separate non-hypothetical experimental auctions are used to elicit willingness to pay values. Results suggest that willingness to pay vary across the groups that receive differing risk information. Specifically, willingness to pay was higher for the group that was given clear risk information and questions related to life tradeoffs than for the group given ambiguous risk information. Willingness to pay was lowest for the group that was... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Risk and Uncertainty. |
| Ano: 2006 |
URL: http://purl.umn.edu/21429 |
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| Riddel, Mary C.; Shaw, W. Douglass. |
| Risk aversion is well established in the health and safety literature, and ambiguity is addressed in theoretical and experimental economics literature, but few theoretically-consistent empirical models addressing the relationship between ambiguity, risk, and preferences exist. Even fewer address ambiguity about health or mortality risks. To fill this gap, we propose a theoretical non-expected-utility model (NEUM) that is relatively easy to estimate. The NEUM we develop hinges upon two sources of variability, one over risk and the other over uncertainty about the risk. The model, like the second-order probability models of Segal (1987) and Quiggin (1982), grounds ambiguity in the compound lottery context. However, our model differs from previous... |
| Tipo: Report |
Palavras-chave: Environmental Economics and Policy; Risk and Uncertainty. |
| Ano: 2006 |
URL: http://purl.umn.edu/23964 |
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| Registros recuperados: 17 | |
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