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| Registros recuperados: 35 | |
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| Watanabe, Michio; Adams, Richard M.; Wu, JunJie. |
| This research examines a spatially explicit allocation of habitat restoration activities in an Oregon watershed to meet water temperature targets for the benefit of endangered salmonid fish species. Integrating hydrological, biological and economic models, a series of optimization problems are investigated for different policy targets including temperature reductions and enhanced fish populations. Results indicated that the heterogeneous nature of riparian conditions and stream morphology needs to be considered if restoration activities are to be allocated efficiently in a watershed. We also found that it is less costly to implement restoration activities in tributaries if the objective is to maximize stream length where water temperatures decrease by a... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/21995 |
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| Wu, JunJie; Babcock, Bruce A.. |
| Conservation program administered by USDA have traditionally been voluntary, with USDDA providing technical and fiscal assistance to farmers. This tradition is continued din the Federal Agriculture Improvement and Reform Act of 1996. Under these programs, farmers commit themselves to adopting a land management practice and, in turn, the government provides technical and financial assistance. Our analysis suggest that these voluntary programs are more efficient than a program that mandates adoption if and only if the per acre social cost of government expenditure under these program is less than the largest per acre farmer loss under the mandatory approach plus the additional implementation and enforcement cost. This necessary and sufficient condition is... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/18500 |
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| Langpap, Christian; Hascic, Ivan; Wu, JunJie. |
| Land-use change is arguably the most pervasive socioeconomic force driving the change and degradation of watershed ecosystems. This paper combines an econometric model of land use choice with three models of watershed health indicators (conventional water pollution, toxic water pollution, and the number of aquatic species at risk) to examine the effects of land use policies on watershed ecosystems through their effect on land use choice. The analysis is conducted using parcel-level data from four western states in the United States (California, Oregon, Washington, and Idaho). Our results suggest that incentive-based local land use policies, such as development impact fees and preferential property taxation, are most effective in improving water quality and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/21262 |
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| Cho, Seong-Hoon; Wu, JunJie. |
| In this paper, a theoretical model is developed to analyze the interactions among residential development, land use regulations, and public financial impacts (public expenditure and property tax). A simultaneous equations system with self-selection and discrete dependent variables is estimated to determine the interactions for counties in the five western states (California, Idaho, Nevada, Oregon, and Washington). The results show that county governments are more likely to impose land use regulations when facing rapid land development, high public expenditure and property tax. The land use regulations, in turn, decrease land development, long-run public expenditure, and property tax at the cost of higher housing prices and property tax. During the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Community/Rural/Urban Development; Land Economics/Use. |
| Ano: 2001 |
URL: http://purl.umn.edu/20774 |
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| Tanaka, Katsuya; Wu, JunJie. |
| This study integrates economic and physical models to estimate the social costs of several commonly suggested policies (chemical-use tax and three types of conservation payments) for reducing nitrogen loads to the Mississippi River and for controlling hypoxia in the Gulf of Mexico. The economic models predict farmer's crop rotations, tillage practices, and participation in the Conservation Reserve Program (CRP) at more than 44,000 Natural Resource Inventory sites in the Upper Mississippi River Basin. The estimated land use changes under the four policies are incorporated into a physical model to assess their impact on nitrate-N concentrations in the Mississippi River. Results suggest that the fertilizer-use tax is much more cost-effective than the three... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2004 |
URL: http://purl.umn.edu/20135 |
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| Langpap, Christian; Wu, JunJie. |
| A leading cause of biodiversity decline is the habitat destruction associated with urban development. We use a database of county-level land use regulations to analyze the effects of local land use regulations on land use changes. We use the results of this analysis and a species-habitat associations matrix to conduct simulations that relate changes in local land use regulations to changes in biodiversity through predicted changes in land use. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land Economics/Use. |
| Ano: 2004 |
URL: http://purl.umn.edu/20038 |
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| Wu, JunJie; Mapp, Harry P., Jr.; Bernardo, Daniel J.. |
| A dynamic model is developed to analyze farmers' irrigation investment and crop choice decisions under alternative water quality protection policies. The model is applied to an empirical example in the Oklahoma High Plains. The choices of crops and irrigation systems and the resulting levels of irrigation, income, and nitrogen runoff and percolation are simulated over a ten-year period. An effluent tax on nitrogen runoff and percolation is shown to be effective in reducing nitrate pollution. The efficacy of cost sharing in adopting modern irrigation technologies and restrictions on irrigation water use depends on soil type. A tax on nitrogen use is shown to be the least effective policy. |
| Tipo: Journal Article |
Palavras-chave: Crop selection; Dynamic optimization; Irrigation investment; Water quality; Crop Production/Industries. |
| Ano: 1994 |
URL: http://purl.umn.edu/15167 |
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| Li, Man; Wu, JunJie. |
| This paper examines and predicts the effects of climate change and climate extremes on China’s land use conversion and soil carbon sequestration under two alternative climate change scenarios. It intends to investigate the following three questions. 1) How did climate factors affect land-use conversion in China from 1988 to 2000 and what was the relative importance of these factors? 2) How would the predicted future climate change pattern affect land-use choice under alternative climate change scenarios? 3) How would the predicted future climate pattern change the spatial distribution of soil organic carbon in China? The study makes two contributions to the literature. First, it integrates climate change, land use conversion, and soil carbon sequestration... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land-use change; Soil carbon sequestration; Climate change; Environmental Economics and Policy; Land Economics/Use. |
| Ano: 2010 |
URL: http://purl.umn.edu/61671 |
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| Stone, Edward A.; Wu, JunJie. |
| There is broad concern that humans are transforming our environment. This transformation has potential to impact humanity as we depend on the environment ecosystem services. According to the Millennium Assessment (2005), degradation and unsustainable exploitation presently threaten over 60% of ecosystem services with real implications for health and standards of living. Furthermore, both the exploitation of ecosystem services and the growth rate of that exploitation have been far higher in recent decades than ever before due to population growth and rising standards of living, i.e. consumption. Increasing pressure on ecosystem services has driven thinking on mitigation strategies. Payment for ecosystem services (PES) has emerged as a strategy to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/6253 |
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| Lewis, David J.; Plantinga, Andrew J.; Wu, JunJie. |
| This paper develops a theoretical model to analyze the spatial targeting of incentives for the restoration of forested landscapes when wildlife habitat can be enhanced by reducing fragmentation. The key theoretical result is that the marginal net benefits of increasing forest are convex, indicating that corner solutions – converting either none or all of the agricultural land in a section to forest – may be optimal. Corner solutions are directly linked to the spatial process determining habitat benefits and the regulator’s incomplete information regarding landowner opportunity costs. We present findings from a large-scale empirical landscape simulation that supports our key theoretical results. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/92217 |
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| Wu, JunJie; Babcock, Bruce A.. |
| Because it is difficult to monitor emissions by sources in nonpoint pollution and to implement differential taxes and standards, uniform taxes and standards on chemical use are often proposed to control nonpoint pollution. This paper analyzes the relative efficiency of these uniform instruments in the presence of spatial heterogeneity. We demonstrate that the relative slopes of the marginal cost and benefits of chemical use are only one of the factors that affect the relative efficiency. Other factors include correlation between marginal costs and benefits, and the variability of both marginal benefits and the slopes of marginal benefits. In addition, we show how consideration of prohibitive taxes on low-productivity land and nonbinding standards on... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/18449 |
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| Wu, JunJie; Adams, Richard M.; Plantinga, Andrew J.. |
| This paper analyzes the effect of open space and other amenities on housing prices and development density within the framework of an urban equilibrium model. The model is estimated as a system of equations that includes households' residential choice decisions and developers' development decisions and emphasizes the importance of amenities in the formation of development patterns and property values. The model is applied to Portland, Oregon, where ambitious open space programs have been implemented. The results suggest that amenities are important: households are willing to pay more for newer houses located in areas of less dense development, with more open space, better views, less traffic congestion, and near amenity locations. For the developer,... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Community/Rural/Urban Development; R11; R21; R31. |
| Ano: 2003 |
URL: http://purl.umn.edu/21961 |
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| Cho, Seong-Hoon; Wu, JunJie. |
| This paper examines equilibrium properties of local jurisdictions implied by the Tiebout-style model. A set of equilibrium conditions are derived from a general equilibrium model of local jurisdictions. The conditions are parameterized and empirically estimated in a two-stage procedure. The method is applied to communities in a Portland metropolitan area with an extension of public-good provision to include environmental amenities. The results suggest that the model can replicate many of the empirical regularities observed in the data. For example, the predicted income distributions across communities closely matched the observed distribution. The estimated income elasticity of housing demand is consistent with previous findings. One important... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/19863 |
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| Wu, JunJie; Babcock, Bruce A.. |
| Green payment programs, where the government pays farmers directly for environmental benefits, are an alternative to the current method of achieving environmental benefits which restricts farming practices in exchange for deficiency payments. This article presents a voluntary green payment program using the principles of mechanism design under asymmetric information. Information asymmetry arises because the government knows only the distribution of farmers' production situations, rather than farm-specific information. The program is demonstrated with irrigated corn production in the Oklahoma high plains. A green payment program can reduce budget costs and pollution, while increasing the net social value of corn production. |
| Tipo: Journal Article |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 1995 |
URL: http://purl.umn.edu/30774 |
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| Registros recuperados: 35 | |
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