All Dollars are Equal: A Common Economic Fallacy
Thursday, January 4th, 2007Here’s an example of an all-too common fallacy in assessing the rationality of economic actors. It comes from Daniel Kahneman and Jonathan Renshon in Foreign Policy in an otherwise interesting article:
Imagine, for example, the choice between:
Option A: A sure loss of $890
Option B: A 90 percent chance to lose $1,000 and a 10 percent chance to lose nothing.
In this situation, a large majority of decision makers will prefer the gamble in Option B, even though the other choice is statistically superior. People prefer to avoid a certain loss in favor of a potential loss, even if they risk losing significantly more.
Kahneman and Renshon believe Option A to be the rational choice, but in fact Option B should be preferred by most people, most of the time. Do you see why?
(more…)