Book excerpt: This dissertation investigates food access and underserved areas in the U.S. In essay one, I document how in-store product availability varies nationally across different food retailing landscapes, and place these findings in context with existing food desert literature. In essay two, I adapt a demand model, featuring the Distance Metric method, that explicitly incorporates in-store attributes, store type, and store location to infer household behavior around price sensitivity, store switching, and expenditure sensitivity. In essay three, I conduct an equilibrium analysis of store choice that relates both the demand side, from chapter three, and supply side to store attributes, including price-cost margins and product assortment. Using this framework, I simulate changes in the food retailing landscape, based on a hypothetical policy-informed scenario, to investigate resulting costs and benefits to consumers and food retailers. Understanding the interdependencies between firm behavior, consumer reaction, and geographic variation in consumer demographics provides a foundation to examine the impacts of limited food access and policies that might address the problems associated with limited food access.