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| Registros recuperados: 23 | |
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| Souter, Ray A.; Bowker, James Michael. |
| It is a generally known statistical fact that the mean of a nonlinear function of a set of random variables is not equivalent to the function evaluated at the means of the variables. However, in dichotomous choice contingent valuation studies a common practice is to calculate an overall mean (or median) by integrating over offer space (numerically or analytically) an estimated logit or probit function in which sample mean values for the concomitant variables are used. We demonstrate this procedure to be incorrect and we statically test the procedure against the correct method for nonlinear models. Using data resulting in a well-behaved logit model, we reject the hypothesis of congruence between the two means. Such a finding should be considered in... |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1996 |
URL: http://purl.umn.edu/31649 |
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| Bowker, James Michael; Murphy, D.; Cordell, H. Ken; English, Donald B.K.; Bergstrom, John C.; Starbuck, C. Meghan; Betz, Carter J.; Green, Gary T.. |
| This paper explores the influence of demographic and spatial variables on individual participation and consumption of wildland area recreation. Data from the National Survey on Recreation and the Environment are combined with geographical information system-based distance measures to develop nonlinear regression models used to predict both participation and the number of days of participation in wilderness and primitive area recreation. The estimated models corroborate previous findings indicating that race (black), ethnicity (Hispanic), immigrant status, age, and urban dwelling are negatively correlated with wildland visitation, while income, gender (male), and education positively affect wildland recreation participation and use. The presence of a... |
| Tipo: Journal Article |
Palavras-chave: Logistic; Negative binomial; Participation; Recreation; Visits; Wilderness; Environmental Economics and Policy; Land Economics/Use; Q21; Q26; Q24. |
| Ano: 2006 |
URL: http://purl.umn.edu/43765 |
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| Bowker, James Michael; Richardson, James W.. |
| The purpose of this study was to describe an LP/IO model for evaluating the economic impacts of alternative farm policies on rural communities and demonstrate its capabilities by analyzing the impacts of three farm policies on a rural community in Texas. Results indicate that in the noncrop sector, two groups of industries are most affected by farm policy. The first group relates to production directly (agricultural services, banking and credit, and nondurable manufacturing) and the second group relates to households (retail trade and services). Farm policies which reduce production but increase net returns cause losses for the first group while benefitting the second group. Both groups are made worse off by farm policies which reduce agricultural... |
| Tipo: Journal Article |
Palavras-chave: Agricultural and Food Policy; Community/Rural/Urban Development. |
| Ano: 1989 |
URL: http://purl.umn.edu/30088 |
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| Park, Timothy A.; Bowker, James Michael; Leeworthy, Vernon R.. |
| Coastal coral reefs, especially in the Florida Keys, are declining at a disturbing rate. Marine ecologists and reef scientists have emphasized the importance of establishing nonmarket values of coral reefs to assess the cost effectiveness of coral reef management and remediation programs. The purpose of this paper is to develop a travel cost - contingent valuation model of demand for trips to the Florida Keys focusing on willingness to pay (WTP) to preserve the current water quality and health of the coral reefs. The stated and revealed preference models allow the marginal valuation of recreationists to adjust depending on current and planned trip commitments in valuing nonmarginal policy changes in recreational opportunities. The integrated model... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2000 |
URL: http://purl.umn.edu/16713 |
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| Bowker, James Michael; English, Donald B.K.; Bergstrom, John C.; Starbuck, C. Meghan. |
| The Forest Service controls vast quantities of natural resources including timber, wildlife, watersheds, air sheds, and ecosystems. For many of these resources, recreation is one of the primary uses of the natural asset. Recreation visits taken to National Forests are not "purchased" in the same type of market as other goods (e.g., timber, grazing, or housing). The price of, and ultimately benefit received from, recreation to National Forests cannot be estimated via traditional market prices and quantities. Alternate methods must be employed to estimate the value of recreation access. We use on-site survey data from the Forest Service's National Visitor Use Monitoring database (2000-2003) and stated preference demand estimation methods to model annual... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2005 |
URL: http://purl.umn.edu/19506 |
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| Gentle, Paul F.; Bergstrom, John C.; Betz, Carter J.; Bowker, James Michael; Cordell, H. Ken; English, Donald B.K.; Teasley, R. Jeff. |
| Future demand projections reported in this paper indicate a steady increase in demand for outdoor recreational opportunities in U.S. regions where BLM lands are located. From a supply perspective, BLM lands represent "prime targets" for meeting increased recreational demand in the western U.S. The BLM will face the challenge of balancing increased recreation use with other multiple uses, and minimizing the negative environmental impacts of increased recreation use such as damages caused by motorized vehicles, horses and foot traffic. In the future, the BLM will also face management challenges related to financing the provision of increased recreational opportunities. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land Economics/Use; Resource /Energy Economics and Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/16665 |
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| Cho, Seong-Hoon; Bowker, James Michael; Park, William M.. |
| This study estimates the influence of proximity to water bodies and park amenities on residential housing values in Knox County, Tennessee, using the hedonic price approach. Values for proximity to water bodies and parks are first estimated globally with a standard ordinary least square (OLS) model. A locally weighted regression model is then employed to investigate spatial non-stationarity and generate local estimates for individual sources of each amenity. The local model is able to capture the variability in the quality of water bodies and parks across the county, something a conventional hedonic model using OLS cannot do. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land Economics/Use. |
| Ano: 2006 |
URL: http://purl.umn.edu/21242 |
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| Adhikari, Murali; Bergstrom, John C.; Houston, Jack E.; Bowker, James Michael; Paudel, Laxmi; Cordell, H. Ken. |
| A logit model was used to determine the major factors explaining willingness to participate of an individual in the wilderness or other primitive area visits. The results of the study showed that education and environmental awareness were in wilderness participation decision. Demographic variables like age, race, and sex also were statistically significant and emerged as important policy variables in defining wilderness participation behavior. Characteristics of wilderness areas like crowdness, pollution, and poor management failed to produce any significant impacts in the decision making process of wilderness area visit. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Wilderness or other primitive area visits; Policy variables; Demographic characteristics; Participation behavior; Consumer/Household Economics. |
| Ano: 2003 |
URL: http://purl.umn.edu/35093 |
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| Registros recuperados: 23 | |
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