The field of economics studies what people do in a world of scarce resources. One of the biggest scarce resources is time.

There are only 24 hours in a day, and we have only so many days on earth. The question of what we do with that time has puzzled philosophers, artists — and economists.

Today on The Indicator, we talk to economist Daniel Hamermesh, whose new book Spending Time examines time's complicated relationship to money, stress, and gender.