This study uses a choice experiment to characterize market segments (consumer preferences heterogeneity) based on three attributes of seafood (mussels) that are affected by ocean acidification: shell appearance, meat color, and nutritional composition. Using a sample of 1,257 individuals from two main cities in Chile, we estimate both the Mixed Logit model and the Latent Class model. We use the individual-specific posterior (ISP) parameters’ distribution to categorize consumers’ heterogeneity based on the signs and intensity (i.e., like or dislike dimension) of these ISPs.

We conducted a RCT to test whether updating nutrition information sets of parents along with nudges reduces excess body fat among primary schoolchildren in urban Vietnam. Parents of overweight or obese children were randomly offered a nutrition consultation that led to goal setting with soft commitment, BMI-for-age report card, and weight scale. After 6 months, the intervention reduced body fat, waist circumference, and the likelihood of being overweight or obese, which are partly explained by improvements in diets and diet-related parental perceptions.