Policies and programs to improve global nutrition increasingly aim to improve diet quality through systemic change in food environments, often focusing on the availability and price of diverse food items. Almost all of the world’s governments conduct nationally representative surveys of retail...

Policies and programs often aim to improve the affordability of nutritious diets, but existing food price indexes are based on observed quantities which may not meet nutritional goals. To measure changes in the cost of reaching international standards of diet quality, we introduce a new Cost of...