Private and public willingness to pay for safety: A validity test

Area of Science:

• Environmental Economics
• Public Policy Analysis
• Behavioral Economics

Background:

• Stated preference (SP) methods are widely used to gauge public valuation of non-market goods like safety and environmental quality.
• Hypothetical market scenarios in SP studies offer known alternatives but require rigorous validity testing due to the hypothetical nature of decisions.
• Existing research often focuses on eliciting preferences for public goods, with less emphasis on comparative validity against private goods.

Purpose of the Study:

• To propose and test a validity criterion for stated preference estimates concerning safety measures.
• To investigate the relationship between willingness to pay (WTP) for private versus public safety measures.
• To emphasize the importance of incorporating both private and public WTP elicitation for robust validity assessment.

Main Methods:

• Development of a validity test based on theoretical predictions and empirical evidence for private and public safety measures.
• Utilizing a comprehensive dataset that collected both private and public willingness to pay (WTP) data.
• Comparative analysis of WTP values derived from hypothetical market scenarios for private and public safety attributes.

Main Results:

• Empirical findings indicate that individuals report a higher willingness to pay (WTP) for private safety measures compared to public safety measures.
• The results contradict the theoretical prediction that WTP for public safety should be greater than or equal to private safety WTP.
• This discrepancy underscores potential biases or inconsistencies in stated preference data for safety valuations.

Conclusions:

• Validity tests are essential for stated preference estimates, particularly for safety-related attributes.
• Eliciting willingness to pay (WTP) for private safety measures alongside public ones is crucial for conducting meaningful validity checks.
• Future stated preference research should integrate comparative WTP elicitation to enhance the reliability and validity of findings regarding public goods and safety.