A Theory of Fads, Fashion, Custom, and Cultural Change as Informational Cascades.¶
Bikhchandani, S., Hirshleifer, D., & Welch, I. (1992). A Theory of Fads, Fashion, Custom, and Cultural Change as Informational Cascades. Journal of Political Economy, 100(5), 992-1026.
Cited by¶
8 citations across 8 artifacts.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Abilene Paradox
- This produces an information cascade with a self-fulfilling equilibrium: if member 1 assents (to avoid being the first mover with no assurance of support), member 2 reads that assent as evidence of preference for \(X\), updates toward "others want \(X\)," and rationally assents too, and so on down the line.
This sourceEstablishes the information-cascade model in which agents rationally ignore private signals and follow observed predecessors, yielding self-reinforcing convergence.
- This produces an information cascade with a self-fulfilling equilibrium: if member 1 assents (to avoid being the first mover with no assurance of support), member 2 reads that assent as evidence of preference for \(X\), updates toward "others want \(X\)," and rationally assents too, and so on down the line.
- Conformity
- Bikhchandani, Hirshleifer, and Welch (1992) modeled how rational agents observing predecessors can abandon their own private signals once a few early choices align, producing fragile aggregate conformity from individually sensible decisions.
This sourceInformation-cascade model in which rational agents observing predecessors abandon their own private signals once early choices align, producing fragile aggregate conformity — supports the financial-herding/cascade claim. Live-verified.
- Bikhchandani, Hirshleifer, and Welch (1992) modeled how rational agents observing predecessors can abandon their own private signals once a few early choices align, producing fragile aggregate conformity from individually sensible decisions.
- Herding Behavior
- The core insight is that collective behavior can be rational at the individual level yet aggregatively detached from the system's total information.
This sourceFoundational formalization of information cascades: rational sequential observers copy predecessors' choices once public signal weight overrides private signal, producing fragile consensus and lock-in.
- The core insight is that collective behavior can be rational at the individual level yet aggregatively detached from the system's total information.
- Information Cascade
- Each decision reinforces the apparent correctness of the path, cascading forward through a chain of independent actors.
This sourceFoundational formalization of information cascades: rational sequential observers copy predecessors' choices once public signal weight overrides private signal, producing fragile consensus and lock-in.
- Each decision reinforces the apparent correctness of the path, cascading forward through a chain of independent actors.
- Speculative Bubble
- The same reasoning transfers across substrates: an ecologist asks what the carrying capacity is and how fast the resource is depleting; a technology analyst asks how much of the investment inflow is justified by near-term capability versus by the inflow itself, a reflexive-feedback logic Bikhchandani, Hirshleifer, and Welch (1992) formalize through their theory of informational cascades, where each entrant rationally infers value from prior entrants rather than from fundamentals.
This sourceFoundational formalization of information cascades: rational sequential observers copy predecessors' choices once public signal weight overrides private signal, producing fragile consensus and lock-in.
- The same reasoning transfers across substrates: an ecologist asks what the carrying capacity is and how fast the resource is depleting; a technology analyst asks how much of the investment inflow is justified by near-term capability versus by the inflow itself, a reflexive-feedback logic Bikhchandani, Hirshleifer, and Welch (1992) formalize through their theory of informational cascades, where each entrant rationally infers value from prior entrants rather than from fundamentals.
- Spiral Of Silence In Publics
- This skeleton lets the analyst recognize the same dynamic in settings that share no surface vocabulary: financial cascades, where asset prices estimate fundamental value but trades themselves move prices; academic-citation cascades, where perceived field consensus is read from what gets cited; and fashion or status hierarchies, where visible signals estimate the distribution of valuations and feed back into who signals.
This sourceFormalizes informational cascades — agents rationally inferring information from others' visible actions — the general signal-feedback family within which fashion, citation, and price cascades sit alongside (and contrast with) the spiral.
- This skeleton lets the analyst recognize the same dynamic in settings that share no surface vocabulary: financial cascades, where asset prices estimate fundamental value but trades themselves move prices; academic-citation cascades, where perceived field consensus is read from what gets cited; and fashion or status hierarchies, where visible signals estimate the distribution of valuations and feed back into who signals.
Mechanisms¶
- Narrative Momentum Stress Test
- Its strength is that it distinguishes a grounded move from an information cascade — a sequence in which each actor rationally infers value from others' visible choices
This sourceDefines an informational cascade as rationally following predecessors’ observed actions without regard to one’s own information.
- Its strength is that it distinguishes a grounded move from an information cascade — a sequence in which each actor rationally infers value from others' visible choices
- Sealed Ballot Before Voice Vote
- Its strength is that it defuses the information cascade — the sequence effect in which each person, seeing others' choices, rationally discounts their own private signal until the public tally stops reflecting anyone's real information
This sourceModels how observing predecessors can rationally cause a decision maker to disregard private information.
- Its strength is that it defuses the information cascade — the sequence effect in which each person, seeing others' choices, rationally discounts their own private signal until the public tally stops reflecting anyone's real information
Verification¶
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