A Revealed Preference Approach to Measuring Hunger and Undernutrition / Robert T. Jensen, Nolan H. Miller.

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Jensen, Robert T

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TextSeries: Working Paper Series (National Bureau of Economic Research) ; no. w16555.Publication details: Cambridge, Mass. National Bureau of Economic Research 2010.Description: 1 online resource: illustrations (black and white)Subject(s):

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Abstract: Caloric intake and minimum calorie thresholds are widely used in developing countries to assess hunger and nutrition, and to construct poverty lines. However, it is generally recognized that the sufficiency of an individual's caloric intake cannot be determined, due to: a lack of consensus on the true thresholds; the fact that any such thresholds are individual-varying and unobservable; imperfect nutrient absorption; and the weak and non-monotonic empirical relationship between calories and wealth. We propose a revealed preference approach to measuring hunger and undernutrition that overcomes these challenges. Low caloric intake is associated with a large utility penalty (e.g., physical discomfort). The corresponding high marginal utility of calories causes a utility-maximizing consumer to primarily consume the cheapest available source of calories (a staple). Once they have surpassed subsistence, the marginal utility of calories declines significantly and they substitute towards foods with higher levels of non-nutritional attributes (e.g., taste). Thus, though any individual's requirements are unobserved, their choice to switch away from the staple reveals they are above that requirement. Accordingly, the percent of calories obtained from the staple can be used to indicate nutritional sufficiency. We also provide an application for China that shows the desirable empirical properties of this approach.

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November 2010.

Caloric intake and minimum calorie thresholds are widely used in developing countries to assess hunger and nutrition, and to construct poverty lines. However, it is generally recognized that the sufficiency of an individual's caloric intake cannot be determined, due to: a lack of consensus on the true thresholds; the fact that any such thresholds are individual-varying and unobservable; imperfect nutrient absorption; and the weak and non-monotonic empirical relationship between calories and wealth. We propose a revealed preference approach to measuring hunger and undernutrition that overcomes these challenges. Low caloric intake is associated with a large utility penalty (e.g., physical discomfort). The corresponding high marginal utility of calories causes a utility-maximizing consumer to primarily consume the cheapest available source of calories (a staple). Once they have surpassed subsistence, the marginal utility of calories declines significantly and they substitute towards foods with higher levels of non-nutritional attributes (e.g., taste). Thus, though any individual's requirements are unobserved, their choice to switch away from the staple reveals they are above that requirement. Accordingly, the percent of calories obtained from the staple can be used to indicate nutritional sufficiency. We also provide an application for China that shows the desirable empirical properties of this approach.