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 Bellucco-Chatham is an editor, writer ...

Discover what administered prices are, their role in economies, examples from history, and how they impact supply, demand, and economic efficiency.

John Maynard Keynes, memorializing the death of his mentor Alfred Marshall a century ago, wrote that the “master-economist must possess a rare combination of gifts…. He must be mathematician, ...

Weak form market efficiency is a concept that suggests past stock prices and trading volumes do not predict future stock prices. In a weak form efficient market, all historical information is already ...