Fig. 1

Simulated online grocery store used in randomized-controlled trial

This screenshot shows an example of the store in action under the combined warning labels + tax arm. On the right-hand side is the shopping list participants are instructed to follow. In the warning labels and combined warning labels + tax arms, items with red meat display two octagonal warning labels. These labels show up in search results as well as on individual product pages. Taxes (30%) on products containing red meat are applied in the tax and combined warning labels + tax arms, but are not indicated in any way to the participant. For example, the price of a single beef and bean burrito is $1.30 in the tax or combined warning labels + tax arms (as shown here). If a participant were randomized to the control or warning labels arm, the price for the same beef and burrito would be $1.00