Experiment Setup
The online store was situated in an experimental laboratory in a university. Each participant was provided with a dedicated computer terminal to shop during the visit to the store. The store stocked 89 stock keeping units (SKUs) in nine product categories which remained unchanged throughout the experiment. These categories and SKUs were picked based on screening responses, being commonly purchased items. Detailed pricing data from a local grocery chain, both for online and offline stores, was collected for several months preceding the study. We used these data to calculate the average price and price changes for each of the SKUs.