Tim T. Phipps

Measuring The Benefits of Air Quality Improvement: A Spatial Hedonic Approach

Abstract The primary objective of this paper is to improve the methodology for estimating hedonic price functions when the data are inherently spatial. A spatial-econometric hedonic housing price model is developed and estimated for the Seoul metropolitan area to measure the marginal value of improvements in sulfur dioxide (SO2) and nitrogen dioxide (NOx) concentrations. Diagnostic testing favored the spatial-lag model over the spatial error model. Results showed that SO2 pollution levels had a significant impact on housing prices while NOx pollution did not. The authors attribute this differential impact to the relatively higher levels of SO2 pollution when compared with pollution standards and the relative recency of the NOx pollution. Marginal WTP for a 4% improvement in mean SO2 concentrations is about

Data Needs to Assess Environmental Quality Issues Related to Agriculture and Rural Areas

2333 or 1.4% of mean housing price.

A METHODOLOGY FOR EVALUATING THE COSTS OF SELECTIVE HANDLING OF OVERBURDEN MATERIALS

The assessment of environmental quality problems and the design and economic evaluation of alternative federal, state, and local policy strategies to address environmental issues require complex analyses which must address the underlying physical, biological, social, and economic processes. The study of environmental problems is thus inherently multidisciplinary and should involve the physical, biological, and social sciences. Unfortunately, the multidisciplinary nature of environmental issues has caused problems with the quality and general availability of the data necessary for appropriate analyses. While data have been collected in many areas to address discipline-specific problems, there has been little regard for the eventual need to coordinate analyses across disciplinary lines. As Portney points out, this lack of coordination in data collection is reflected in the often Bal-

ROLE OF VOLUNTARY PROGRAMS IN AGRICULTURAL NONPOINT POLLUTION POLICY

Selective handling of overburden materials involves implementing mining techniques that will reduce the probability of creating acid mine drainage (AMD). These include separately handling toxic materials and placing them in locations in the backfill to limit their exposure to air and water, or blending alkalineand acid-producing materials to create a neutral rock mass. This paper uses three selective handling situations and estimates the additional costs of selective handling above those which would normally be incurred during mining. Scenario 1 depicts a 2-m (6-ft) toxic shale layer (acid-producing) on top of the coal that must be specially handled and placed within non-toxic layers in the backfill. Scenario 2 has a 2-m toxic shale layer over the coal and also a 2-m layer of alkaline material, and these two layers are blended during backfilling. Scenario 3 details specially handling a 0.4-m (1.4-ft) toxic layer located 5 m (15 ft) up from the coal bed which requires blasting in two stages. Based on these scenarios and the overburden layers separately handled, additional costs for loading and hauling the material ranged from

The Political Economics of California’s Proposition 65

663 per 46 by 43 m (150 x 142 ft) cut (orabout

Discussion of Agricultural Land Values, Government Payments, and Production

3,348 perhaor

Employment, income, migration and public services: A simultaneous spatial panel data model of regional growth

1,353 per acre) for scenario I to

Stream Water Quality Management: A Stochastic Mixed-integer Programming Model

1,119 per46 by 43 m cut (or about

Externalities and the Returns to Agricultural Research: Discussion

5,652 per ha or

Measuring The Benefits Of Air Quality Improvement: A Spatial Hedonic Approach

2,284 per acre) for scenario 2. These cost estimates do not include additional management costs, additional blasting costs, or training costs for equipment operators. Additional