How many judgment and decision making (JDM) researchers have not claimed to be building on Herbert Simon's work? We identify two of Simon's goals for JDM research: He sought to understand people's decision processes---the descriptive goal---and studied whether the same processes lead to good...

Economist Frank H. Knight (1885--1972) is commonly credited with defining the distinction between decisions under ``risk'' (known chance) and decisions under ``uncertainty'' (unmeasurable probability) in his 1921 book Risk, Uncertainty and Profit. A closer reading of Knight (1921) reveals a host...