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Using Stated Preferences: Comments . Anna Alberini University of Maryland. What Should We Use SP for?. Presentations are focused on the benefits of TMDL requirements
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Using Stated Preferences:Comments Anna Alberini University of Maryland
What Should We Use SP for? • Presentations are focused on the benefits of TMDL requirements • …but they could also be used to assess potential and cost-effectiveness of policies, esp. those aimed at homeowners, small businesses, numerous entities • E.g. rain gardens, rain barrels • See ERS-USDA researchers present at this workshop
Stated Preference Methods • Contingent valuation • would you pay $X for…? • gets non-use values • Protest responses • Contingent behavior • Would you still go to…/how many times would you go to… [under new conditions]? • Well suited with recreational users • Conjoint choice experiments • Private goods [e.g., recreational trips] or policy packages • Attribute-based • Non-use values?
Moore presentation • Combined RP-SP • recreational users/uses • Can do within the same questionnaire in original survey • Likely to work well for Bay recreational users and commercial fishermen • Housing values • Earlier work has produced mixed results • No data on non-fishing recreation/other places in watershed • Not difficult to develop new data: • Marinas, state registration lists for boaters, etc.
Moore presentation (2) • Concerns about double counting • Select your categories of users/not users carefully • Concerns about time horizons re: credibility of questionnaire • People probably understand that it took a long time to mess up the Bay and that it will take a long time to fix it up • Payment vehicle • People may have preferences over the payment vehicle • E.g., I am willing to pay for improved storm water mgmt. but not for farmers to improve their practices (even if they affected the CB to the same extent) • Split-sample treatments to test? • “distance traveled for choice experiment” (slide 4)?
Boyd-Krupnick Acres of wetlands Home production function of ecological services of wetlands Ecological services of wetlands Take home message: U=U(Acres, h(Acres), g(h(Acres))
Earlier SP research has found that people are generally willing to pay more for more acres, more species abundance, etc. • Scope but not WTP not strictly proportional to acres, species, etc.
Both presentations • “Iconic” value of the CB prefer to say “historic/cultural heritage site” • Why worry about “warm glow?” perfectly legitimate component of WTP for the Bay, esp. non-users • Concur that surveys should not focus on jobs, watermen, Amish, …