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Two studies compared food availability and prices in large and small stores across neighborhoods of varying income levels in New Haven, Connecticut. The findings suggest that supermarket access in lower-income neighborhoods has improved since 1971, and average food prices are comparable across income areas. Despite this progress, stores in lower-income neighborhoods (compared to those in higher-income neighborhoods) stock fewer healthier varieties of foods and have fresh produce of much lower quality. Policies are needed not only to improve access to supermarkets, but also to ensure that stores in lower-income neighborhoods provide high-quality produce and healthier versions of popular foods.
Andreyeva et al. (Mon,) studied this question.