At the heart of economics lies a deceptively simple idea that shapes everything from market strategy to personal growth: marginal value theory. Those who adhere to it insist that when making decisions ...

Businesses measure productivity in two ways: marginal and average. The calculation of both types often yields different answers as a result of the fundamental differences behind each measurement. In ...

If you buy something from a Verge link, Vox Media may earn a commission. See our ethics statement. is editor-in-chief of The Verge, host of the Decoder podcast, and co-host of The Vergecast. Bill ...