Figure 1
The illustration shows a cropped map of Bologna, Italy, displaying several location markers in two distinct colors, yellow and purple. The yellow markers represent conventional retailers and are scattered primarily in the city center and southwest areas. The purple markers denote discount retailers, appearing mostly in the northern and central parts of the city. Below the map, a legend associates a yellow marker with “Conventional retailer” and a purple marker with “Discount retailer”.Map of supermarkets