“…First, we control for the share of household with children, median age in the zip code, as well as the average household size in the zip code, as the size of the household affects the likelihood of shopping at FMs (Gumirakiza, Curtis, and Bosworth 2014). As ethnicity seems to be correlated with FMs’ location (Singleton, Sen, and Affuso 2015), we control for the share of nonwhite individuals in the zip code. We also include the share of individuals with bachelor's degrees or higher as other studies find that having completed postgraduate work is a likely feature of FMs’ shoppers (e.g., Wolf, Spittler, and Ahern, 2005).…”