The marginal majority effect: When social influence produces lock-in

Area of Science:

• Social and behavioral sciences
• Decision-making
• Collective behavior

Background:

• Social influence often leads to the dominance of initially popular options, even if they are of lower quality.
• Previous experiments have yielded conflicting results regarding whether social systems self-correct or lock into suboptimal choices.

Purpose of the Study:

• To identify a behavioral phenomenon that explains how inferior options can achieve dominance.
• To reconcile conflicting empirical evidence on social lock-in and self-correction.

Main Methods:

• Analysis of recent experimental data to identify and demonstrate the marginal majority effect.
• Modeling the conditions under which social lock-in occurs based on the strength of the marginal majority effect and quality differences.

Main Results:

• The "marginal majority effect" was identified, characterized by a discontinuous increase in choice probability when an option's popularity surpasses a competitor's.
• Inferior lock-in was found to be contingent on the marginal majority effect being strong enough to outweigh quality differences.
• Conflicting empirical findings were reconciled by demonstrating that lock-in is rare when the effect is weak.

Conclusions:

• The marginal majority effect provides a mechanism for inferior lock-in in social systems.
• The strength of this behavioral phenomenon is critical in determining whether social systems self-correct or become locked into suboptimal choices.
• This research bridges behavioral science findings with the understanding of social lock-in dynamics.