Diet-related disease Nutritional, Metabolic, Endocrine
Conditions
Interventions
The researchers will evaluate the following two interventions:
???Eco-labelling: Eco-labels provide consumers with information on the environmental impact of their food purchases, graded from A (low
Sponsors
Economic and Social Research Council
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Be 18 years or older and located in the UK 2. Be the primary grocery shopper of their household 3. Frequently buy groceries online (at least once per month, self-reported) 4. Usually shop at the supermarket(s) included in this study 5. Usually use a laptop or desktop with the Google Chrome browser for online grocery shopping or be willing to do so for the duration of the study 6. Consent to participate and be willing to download and install the plug-in and use it for the duration of the study
Exclusion criteria
Exclusion criteria: Has participated in the pilot study or previous wave(s) of the study
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The average eco-score of the basket of groceries purchased, with a lower score meaning more sustainable purchases. Using this outcome variable, the researchers will estimate the effect size of introducing eco-labels (intervention 1) and the price-elasticity for sustainable alternative products (intervention 2), allowing them to calculate the willingness to pay for sustainable groceries. They aim to measure both short- and long-term responses to price discounts to see if trying a more sustainable alternative may shift demand persistently beyond a one-time purchase. All outcomes will be measured either over the 8-week intervention period or at the end of that period. | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Basket eco-score for 16 impact categories of the Product Environmental Footprint (PEF): climate change, water use, resource use: minerals and metals, resource use: fossils, land use, ozone depletion, human toxicity: cancer, human toxicity: non-cancer, ionising radiation and human health, particulate matter, eutrophication: marine, acidification, eutrophication: terrestrial, eutrophication: freshwater, ecotoxicity: freshwater). This outcome will give some insight into what type of improvements can be expected from more sustainable grocery shopping because of the interventions. It is likely that the largest sustainability gains can be realised on the impact category climate change (greenhouse gas emissions). 2. The nutritional value of the basket of groceries purchased, as measured by the Food Standard Agency’s (FSA) Nutrient Profiling Model. The researchers will use the changes in the nutritional composition of groceries purchased to model the health impact of their interventions if these were delivered at scale in the UK using the PRIMEtime model, a multi-state life table model, to calculate the impact of the interventions on diet-related diseases. 3. Total cost of the shopping basket: The total cost of the shopping basket per household expressed in £ will be used to understand the impact on grocery costs. 4. Total number of products in the basket. This is primarily to check whether shoppers respond to eco-labels by buying more (less sustainable) products elsewhere (e.g. by adding them to their order on the mobile or by buying them at a different supermarket). All outcomes will be measured either over the 8-week intervention period or at the end of that period. | — |
Countries
England, United Kingdom
Contacts
Public ContactThijs van Rens
Outcome results
None listed