Understanding Bounded Rationality in Decision Making

What is this page about?

Bounded rationality is Herbert Simon's answer to the classical "economic man" model, which assumed people have complete information, unlimited processing power, and perfect optimization. This page explains why that model fails and lays out the three real bounds on human decisions: cognitive limits, incomplete information, and time constraints. It covers satisficing (choosing an option that is good enough rather than optimal), the role of heuristics, Gerd Gigerenzer's ecological-rationality view and the less-is-more effect, and the Kahneman-Gigerenzer debate, then draws out design implications for defaults, simplification, and choice architecture.

What has been corrected on this page?

Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.

1. 28 July 2026 · corrected by Emir Baycan

   Corrected three overstated or unverifiable claims: noted that the Iyengar and Lepper (2000) jam-study choice-overload effect has had mixed replication success, with meta-analyses (Scheibehenne et al., 2010) finding the average effect across studies small and inconsistent; generalized an unverifiable '2019 Beshears and Choi... 23 percent lower catastrophic error rate' study to the broader, real finding that structured decision aids tend to reduce serious errors compared to unstructured judgment; and qualified the health-insurance-marketplace '50 to 10 options increases enrollment quality' claim as varying by market rather than one consistent verified figure.

   What the page claimed

   The article said the jam-study effect was subsequently replicated across product categories, cited a specific 2019 Beshears and Choi study with a precise 23% error-reduction figure, and gave a specific 50-to-10 health-insurance option-reduction enrollment-quality claim.

   What was corrected

   Added the replication debate to the jam study, generalized the unverifiable Beshears-Choi figure to the broader supported finding, and qualified the health-insurance figure as market-dependent.

   Why: The replication record for choice overload is genuinely mixed, one citation carried the signature of unverified precision, and the insurance figure could not be traced to a single verified source. Corrections add nuance and generalize rather than inventing sources.

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2. 11 July 2026 · corrected by Emir Baycan

   Shannon's ~10^120 is the number of possible games, not board positions

   Before

   approximately 10^120 game positions by Shannon's 1950 estimate

   After

   approximately 10^120 possible games by Shannon's 1950 estimate

   Why: Corrected the description of Shannon's estimate; the ~10^120 figure refers to the number of possible games (the Shannon number), not board positions. Verified already live on the article; also confirmed no leftover instances in faq, excerpt, meta_description, or seo_keywords.

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