In behavioral economics, an 'information cascade' occurs when individuals make decisions based on the observations of previous actors rather than their own private knowledge. Consider a sequential decision-making scenario where each participant receives a private signal about the optimal choice but can also observe the choices made by those who acted before them. If the first two actors choose option X, the third actor, even if holding a private signal favoring option Y, may conclude that the combined weight of the previous actors' presumed information outweighs their single private signal, leading them to also choose X. Once this occurs, subsequent actors face an even larger consensus, rendering their private signals effectively meaningless. The hallmark of a true information cascade is not mere conformity or peer pressure, but rather a rational deduction: individuals suppress their own valid contradictory evidence because the observable history of decisions implies a superior collective knowledge. Crucially, if the initial actors' decisions were based on flawed signals, the entire cascade propagates an error, despite the group as a whole possessing enough latent accurate private information to arrive at the correct decision.
Based on the passage's description of an information cascade, which of the following scenarios accurately illustrate this phenomenon? Select all that apply.
- A hiring manager interviews a candidate and assesses them as largely unqualified. However, upon discovering that three prestigious rival firms have already extended lucrative offers to the candidate, the manager concludes her assessment must have missed subtle positive attributes and extends an offer as well.Answer
- BA junior executive spots a critical flaw in a proposed merger. During a board meeting, after hearing the CEO and several senior partners enthusiastically endorse the merger, the junior executive decides to remain silent and vote in favor, fearing that dissent will stall his career advancement.
- A medical researcher analyzes trial data and strongly suspects a new drug is ineffective. After learning that four prominent research hospitals have recently adopted the drug as their standard treatment, the researcher deduces that her own analysis must be flawed and begins prescribing the drug.Answer
- DA tourist arrives in a foreign city without having researched any dining options. Seeing a long line of locals waiting outside a particular restaurant, she decides to eat there, reasoning that the locals must possess knowledge about where the best food is served.
- EA financial analyst receives a highly reliable private tip that a major corporation will soon declare bankruptcy. Acting strictly on this tip, the analyst immediately sells all his shares in the corporation, inadvertently causing a massive sell-off among other investors who observe his trade.