How does spending change over a lifetime? Sam Ro investigates:
HS Dent, an economic forecasting firm, compiled Census data on spending behavior and presented them as a series of demand curves. The curves measure average annual expenditure for a given product over the age of the consumer. … What are some things we learned? Well, men spend less on underwear as they get old, but spending on robes spike near the end of life. As we get older we use a lot less plastic cutlery. And alcohol consumption stays pretty steady from the day we turn 21 until we turn around 70.