Utility functions measure consumer preferences and satisfaction with goods or services. They help analyze consumer decisions to maximize satisfaction in rational choice theory. Economists and ...

Body dysmorphic disorder (BDD), commonly called body dysmorphia, is a psychiatric disorder in which people become obsessed with what they perceive as a body “flaw” or imperfection. BDD goes beyond ...

Jared Ecker is a researcher and fact-checker. He possesses over a decade of experience in the Nuclear and National Defense sectors resolving issues on platforms as varied as stealth bombers to UAVs.

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Amanda Jackson has expertise in personal ...