We model happiness as a measurement tool used to rank alternative actions. Evolution favors a happiness function that measures the individual’s success in relative terms. The optimal function is based on a time-varying reference point—or performance benchmark—that is updated...

Background facts / James Piereson -- The broad-based rise in return to top talent / Joshua D. Rauh -- The economic determinants of top income inequality / Charles I. Jones -- Intergenerational mobility and income inequality / Jörg L. Spenkuch -- The effects of redistribution policies on growth...