A new study led by Washington State University (WSU) suggests that consumers may be willing to pay around 10% more for vehicle tyres designed to reduce harm to salmon populations.
The research found that the median willingness to pay for tyres carrying a hypothetical “salmon-safe” label was approximately $76 extra for a set of four tyres. The findings indicate that environmentally conscious consumers could provide a potential market for less harmful tyre alternatives.
Published in the journal Marine Resource Economics, the study examined consumer preferences in California, Oregon, and Washington.
Tyre Chemical Linked to Coho Salmon Deaths
The research builds on earlier findings by WSU scientists, who identified a chemical compound called 6PPD as a major contributor to the deaths of adult coho salmon in urban streams.
Tyre manufacturers use 6PPD to prevent rubber from deteriorating too quickly. However, when tyres wear down, particles containing the chemical can enter roads and eventually wash into freshwater streams.
Exposure to the compound can be toxic to coho salmon, raising concerns about the environmental impact of conventional tyre formulations.
Manufacturers are now exploring alternative formulations that could eliminate the chemical. Against this background, WSU economists investigated whether consumers would voluntarily pay more for tyres designed to protect salmon.
“The tire doesn’t exist yet, but we wanted to know how the general population might value the tire after it’s been developed,” said Joe Cook, a professor in WSU’s School of Economic Sciences and lead author of the study.
“As the tire industry explores reformulation, we hope this demonstrates there is a potential market for ‘eco-labeled’ tires.”
Survey Finds Consumers Willing to Pay an Additional $76
The researchers surveyed nearly 700 people living in California, Oregon, and Washington to assess how much they would be willing to pay for tyres carrying a salmon-safe label.
The study found that the median premium was 10% above the price respondents had most recently paid for their tyres. This translates to approximately $76 more for a set of four.
The median represents the point at which half of the respondents were willing to pay more than the estimated premium and half were willing to pay less.
The researchers also found that a substantial group of consumers would consider paying considerably more for environmentally safer tyres.
“Approximately 25% of people said they would pay a premium of $225 for a set of four salmon-safe tires,” Cook said.
“This shows that protecting salmon is very important for a sizeable group of consumers in the three states.”
The study was funded by the nonprofit organisation Salmon Safe, which provides environmental certifications for products and organisations, including wineries, farms, and construction contractors.
Researchers Highlight Potential Market for Eco-Labelled Tyres
The findings suggest that voluntary environmental labelling could influence purchasing decisions and create demand for products designed to reduce ecological damage.
However, the researchers cautioned that the survey examined a hypothetical product rather than tyres already available in the market. Actual consumer behaviour may differ once manufacturers introduce reformulated products and establish their prices.
Cook also clarified that the findings should not be interpreted as evidence that removing 6PPD from tyres through regulation would automatically increase prices by the same amount.
“This study is about voluntary eco-labeling for a hypothetical product,” Cook said. “We aren’t saying that prices would go up this amount if 6PPD is regulated out of tires — that ultimately would depend on what it costs for tire manufacturers to reformulate and how competitive the tire industry is.
“Our results couldn’t be used in a benefit-cost analysis of a state or federal regulation,” he continued. “That would require a different survey approach, but we would be excited to look at that and well-placed to do that work.”
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