Economic Incentives for Managing Filterable Biological Pollution Risks from Trade.

Area of Science:

• Agricultural economics
• Epidemiology
• Environmental economics

Background:

• Infectious livestock diseases are treated as biological pollution, but prior research often overlooks specific externalities and policy designs.
• Existing analyses typically focus on scenarios where those harmed do not contribute to the externality, unlike livestock disease spread.

Purpose of the Study:

• To analyze the economic externalities of infectious livestock diseases, specifically the spread of infection beyond the initial importer.
• To develop efficient policy incentives for managing disease spread, considering importer risk management and uncertainties in introduction and spread.

Main Methods:

• Economic modeling of "filterable externalities" where importer risk management provides impure public goods that reduce disease spillovers.
• Derivation of efficient policy incentives to internalize these externalities under uncertainty.
• Analysis of Nash equilibria in scenarios with multiple interacting importers.

Main Results:

• Efficient policies must incentivize importers' trade choices, self-protection, and abatement efforts, not just trade alone.
• Policy incentives are found to increase with importers' private risk management and their capacity to protect others.
• Multiple Nash equilibria can arise due to filterable externalities when importers can infect each other.

Conclusions:

• Managing infectious livestock diseases requires a comprehensive policy approach that addresses trade, self-protection, and abatement.
• Understanding "filterable externalities" is crucial for designing effective policies that account for importer behavior and interactions.
• The findings suggest that policies can be more effective when aligned with importers' private risk management incentives.