The weight of food guests took from the buffet but did not eat served as the key dependent variable in the study. More specifically, this study measures edible food waste, which is selfserved food that can be eaten, but was left on the plate. For example, salami, cheese, egg omelets, bread, pancakes, cereals, and similar eatable parts of food. The food waste measure excludes inedible food waste (e.g., bones, fruit peels or watermelon or orange skin, eggshells, and similar items).