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| Registros recuperados: 47 | |
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| Loomis, John B.; Gonzalez-Caban, Armando; Englin, Jeffrey E.. |
| Surveys of visitors to National Forests in Colorado were conducted to determine whether different fire ages and presence of crown fires have different effects on hiking and mountain biking recreation visits and benefits. Actual and intended behavior data were combined using a count-data travel cost model. The intended behavior trip questions asked about changes in number of trips due to the presence of a high-intensity crown fire, prescribed fire, and a 20-year-old high-intensity fire at the area respondents were visiting. Using the estimated recreation demand function, years since a non-crown fire had statistically significant positive effect on the trip demand of hikers. In contrast, presence of crown fires had no statistically significant effect on... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2001 |
URL: http://purl.umn.edu/31049 |
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| Loomis, John B.; Traynor, Kerri; Brown, Thomas C.. |
| We investigate the possibility that some respondents to a dichotomous choice question vote YES, even though they would not pay the posted dollar amount in order to register support for the project or policy. A trichotomous choice question format is proposed to determine if allowing respondents the opportunity to vote in favor of a project at an amount less than their bid affects estimated willingness to pay. Using univariate and multivariate tests, we find the trichotomous choice question format reduces the number of YES responses and produces a statistically significant decrease in willingness to pay for an open-space program. |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1999 |
URL: http://purl.umn.edu/30799 |
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| Loomis, John B.; Bell, Paul; Cooney, Helen; Asmus, Cheryl. |
| We estimate adults’ willingness to pay (WTP) to reduce health risks to their own or other families’ infants to test for altruism. A conjoint analysis of adults paying for bottled water found marginal WTP for reduction in risk of shock, brain damage, and mortality in the cash treatment of $2, $3.70, and $9.43, respectively. In the hypothetical market these amounts were $14, $26, and $66, indicating substantial hypothetical bias, although not unexpected due to the topic of infant health. Statistical tests confirm a high degree of altruism in our WTP results, and altruism held even when real money was involved. |
| Tipo: Journal Article |
Palavras-chave: Altruism; Conjoint; Drinking water; Nitrates; Validity; Willingness to pay; Agricultural and Food Policy; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Health Economics and Policy; Institutional and Behavioral Economics; I10; Q53. |
| Ano: 2009 |
URL: http://purl.umn.edu/56657 |
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| Ward, Frank A.; Loomis, John B.. |
| Estimates of the benefits of environmental improvement, usually a nonmarket commodity, can be a valuable part of the information base for economically efficient environmental decision making. The objective of this paper is to review the literature of one class of nonmarket valuation methodologies based on observed consumption behavior subsumed under the term "travel cost demand models." Relative to travel cost demand models, we examine policy issues and underlying concepts focusing on choice theory and welfare evaluation. In addition, we identify major related empirical issues including demand specification, data problems, demand estimation, and welfare measurement. Unanswered questions may contribute to a research agenda. |
| Tipo: Journal Article |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 1986 |
URL: http://purl.umn.edu/32249 |
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| Loureiro, Maria L.; Loomis, John B.. |
| In the current paper, we compare alternative approaches to incorporating uncertainty into the statistical analysis of dichotomous choice responses. In doing so, first we employ previous modelling techniques that included uncertainty of preferences, and secondly we compare the obtained results with those coming from a novel approach here developed, a finite mixture model. The finite mixture model is a very flexible framework used to deal with preference uncertainty. Our case study uses data gathered in the Prestige oil spill valuation study from Spain. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Demand and Price Analysis. |
| Ano: 2007 |
URL: http://purl.umn.edu/10003 |
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| Loomis, John B.; Ekstrand, Earl. |
| A split-sample design is used to test for a difference between mean willingness to pay (WTP) for protecting the Mexican spotted owl versus protecting 62 threatened/endangered species which includes the Mexican spotted owl. The multiple bounded contingent valuation method is used in a mail survey of U.S. residents. The mean WTP amounts are statistically different at the 0.1 confidence level indicating the multiple-bounded mail survey passes the scope test. The range of estimated benefits of preserving the 4.6 million acres of critical habitat for the Mexican spotted owl substantially outweighs the costs of the recovery effort. |
| Tipo: Journal Article |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 1997 |
URL: http://purl.umn.edu/30847 |
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| Poe, Gregory L.; Giraud, Kelly L.; Loomis, John B.. |
| This paper develops a statistically unbiased and simple method for measuring the difference of independent empirical distributions estimated by bootstrapping or other simulation approaches. This complete combinatorial method is compared with other unbiased and biased methods that have been suggested in the literature, first in Monte Carlo simulations and then in a field test of external and internal scope testing in contingent valuation. Tradeoffs between methods are discussed. When the empirical distributions are not independent a straightforward difference test is suggested. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 2002 |
URL: http://purl.umn.edu/19664 |
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| Loomis, John B.; Asmus, Cheryl; Bell, Paul. |
| The objective of this research was to estimate adults' willingness to pay to reduce health risks to their or other families's infants, the latter to test for altruism. A choice experiment was conducted by having adults pay for bottled water for infants to reduce infants' exposure to nitrates in drinking water. Since nitrates only affect infants' health, we have isolated the adults' willingness to pay just for infants' health by buying bottled water to avoid infants' nitrate intake. Respondents were separated into two treatments, one with hypothetical choices, and the other where respondents were told that one of their four choices would be binding, and they would actually buy bottled water using money given to them at the beginning of the experiment.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Altruism; Conjoint; Drinking water; Validity; Willingness to pay; Health Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/9358 |
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| Lohman, Greta; Keske, Catherine M.; Loomis, John B.. |
| Dichotomous choice willingness to pay questions are often used to determine the value visitors place on nature-based recreation. Ambiguity in wording can result in the use of information that does not necessarily reflect visitors’ true WTP. For example, depending on the specificity of the verbiage used, respondents may answer questions on a group basis, rather than an individual basis. To address this issue, experimental surveys were distributed with questions that specifically asked WTP on a per person basis, as compared to control surveys in which the WTP question was more generally worded. Analyses show WTP responses for either survey type are statistically different, with non-overlapping confidence intervals. Furthermore, approaches were conducted... |
| Tipo: Thesis or Dissertation |
Palavras-chave: Dichotomous choice; Willingness to pay; Verbiage; Language; Wording; Group; Individual; Community/Rural/Urban Development; Demand and Price Analysis; Environmental Economics and Policy; Land Economics/Use; Public Economics; Research Methods/ Statistical Methods. |
| Ano: 2010 |
URL: http://purl.umn.edu/60679 |
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| Gonzalez, Juan Marcos; Loomis, John B.; Gonzalez-Caban, Armando. |
| This research updates the joint estimation of revealed and stated preference data of Cameron (1992) to allow for joint estimation of the Travel Cost Method (TCM) portion using count data models. Further these count data models reflect correction for truncation and endogenous stratification associated with commonly used on-site recreation sampling. Our updated modeling framework also allows for testing of consistency of behavior between revealed and stated preference data rather than imposing it. Our empirical example is river recreation visitors to the Caribbean National Forest in Puerto Rico. For this data set we find consistency between revealed preference and stated preference data. We also find little gain in estimation efficiency in our data. This may... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 2006 |
URL: http://purl.umn.edu/21203 |
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| Scheierling, Susanne M.; Loomis, John B.; Young, Robert A.. |
| Meta-regression models are estimated to investigate sources of variation in empirical estimates of the price elasticity of irrigation water demand. Elasticity estimates are drawn from mathematical programming, econometric and field experiment studies reported in the United States since 1963. Explanatory variables include method of analysis, water price, time-frame of analysis, farmers' adjustment options, type of data, and climate. Results indicate that the magnitudes of elasticity estimates are affected by the method of analysis. When separate regressions are performed for the estimates from each method, the price of water at which an elasticity is estimated as well as the time-frame of analysis are found to influence price elasticities. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/20300 |
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| Registros recuperados: 47 | |
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