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Old 08-31-2010, 11:27 AM   #1
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Default New Analysis Weighs Lost Trade, Costs to Control Invasive Species Against Economic Damages

New Analysis Weighs Lost Trade, Costs to Control Invasive Species Against Economic Damages
ScienceDaily
Aug. 24, 2010

New analysis weighs lost trade, costs to control invasive species against economic damages
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The answer: Policymakers must balance concerns about the damage and cost of controlling invaders against the economic necessity of free trade, say economists Santanu Roy, Southern Methodist University, and Lars J. Olson, University of Maryland.

In their article "Dynamic Sanitary and Phytosanitary Trade Policy," Roy and Olson examine the various conditions policymakers must evaluate to determine the best policies governing invasive species based on sound economics. The article was published in July in the Journal of Environmental Economics and Management...
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Old 08-31-2010, 11:28 AM   #2
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Default Invasive species conundrum

Invasive species conundrum
SMU Research

Invasive species conundrum (SMU Research)
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Entry of pests sometimes the best route

From their analysis, Roy and Olson concluded that there are times when the best route is to allow some entry of pests: when damages are low, the pests' growth rate is low and the discount rate the relative weight placed on present costs and benefits compared to those in the future is high enough.

Also, trade policy doesn't have to be too restrictive if the cost of controlling established pest populations is low enough. On the other hand, managing trade to prevent further entry may be warranted when the current established population of the species is below a stage where the growth rate of the invasion is likely to increase sharply. The same is likely to be true if the future cost of controlling an established invasion is likely to be high...
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