http://healthyeatingresearch.org/research/restaurant-realities-inequalities-in-access-to-healthy-restaurant-choices-a-research-brief/

In 2008, Americans were expected to spend $558 billion eating at restaurants. This research brief explores how access to restaurants is related to the risk for obesity and describes what studies show about inequalities in access to different types of restaurants. A Research Brief by Healthy Eating Research, the Robert Wood Johnson Foundation, July, 2008.