Bounded Rationality
What is Bounded Rationality?
Bounded rationality is the idea that people make reasonable decisions within the limits of their information, time, and mental capacity.
Rather than optimizing perfectly, people 'satisfice', they pick a good-enough option given real constraints. The concept, from Herbert Simon, explains why actual choices fall short of the textbook rational ideal.
Bounded Rationality: a worked example
Devon has two weeks to find a room and 60 listings to consider. Reading a listing, arranging a viewing and traveling there runs about 3 hours, so working through all 60 would take 180 hours, which he does not have. Instead he sets a rule: under $900 a month, under 30 minutes from campus, take the first place that clears both. The seventh viewing clears it and he signs, 21 hours spent. Listing 34 might have been $25 cheaper, but reaching it meant 27 more viewings, another 81 hours. Stopping at good enough is what optimizing looks like once search time is priced in.
The mistake students make with bounded rationality
Bounded rationality gets used as a polite word for irrational, or as a label for the whole bias literature. Simon's claim was narrower and less insulting: decision-makers have limited information, limited time and limited computing power, so they build a simplified model of the problem and work inside it. Nothing there says the choice is wrong. Loss aversion and anchoring belong to a separate research line about systematic distortions in judgment.
Bounded Rationality questions
What is satisficing?
Satisficing is picking the first option that clears a threshold you set in advance, rather than ranking every option to find the best one. A hiring manager who interviews candidates until one meets the bar, then stops, is satisficing. The approach works because search itself costs time, and past some point another hour of looking costs more than the improvement it buys. Herbert Simon coined the word by blending satisfy and suffice.
Is bounded rationality the same as irrationality?
Bounded rationality is not irrationality. An irrational choice works against the decision-maker's own goals, while a boundedly rational choice pursues those goals well given real limits on information, time and attention. The difference matters for policy: if people are simply constrained, better information and simpler forms help them, whereas if they hold a stubborn bias, more information often changes nothing. Same behavior on the surface, different fix.
Who developed the concept of bounded rationality?
Herbert Simon developed bounded rationality, arguing that a decision-maker works from a simplified mental model of a problem rather than from the problem itself. His point was that any real chooser, human or machine, faces a computation budget, so the interesting question is which shortcut gets used, not whether a shortcut gets used at all. The idea traveled from economics into psychology, computer science and organizational theory.
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