The Omnivore's Dilemma points out that the food economy doesn't even behave like the normal economy - supply is variable due to weather (bumper crop vs famine year) but demand is inelastic, people generally eat the same amount year-to-year. How do you grow your food business if people only eat so much? One method is to increase portion sizes.

>One method is to increase portion sizes.

I thought the current thing was "shrinkflation"?