Group Cooperation Diverges onto Durable Low versus High Paths: Public Goods Experiments in 134 Honduran Villages

2025-12-10

AI Summary

This study investigates the early divergence and path dependence of public goods cooperation within fixed anonymous five-person groups. Drawing on a field experiment conducted across 134 villages in Honduras with 2,591 participants, the research integrates dynamic contribution tracking with social network centrality analysis. Results reveal that cooperation levels bifurcate into two stable, persistent states—high- and low-cooperation paths—within the initial rounds, with negligible convergence thereafter. This constitutes the first empirical demonstration of bistable bifurcation in collective cooperation: early high contributions by socially central individuals anchor and sustain the high-cooperation trajectory. Predictive accuracy for identifying high-path participants exceeds 85% after just two rounds. Groups in which over 60% of members initially contribute above the group norm exhibit over 90% probability of converging to the high-cooperation path. These findings provide critical micro-level mechanistic evidence for understanding the emergence and stabilization of cooperative behavior.

Technology Category

• Game Theory and Economic Paradigms: Cooperative Game Theory
• Multiagent Systems: Mechanism Design
• Cognitive Modeling & Cognitive Systems: Social Cognition And Interaction

Application Category

• Economics, Online Markets and Human Computation: The sharing economy
• Web Mining and Content Analysis: Models for Web evolution
• Social Networks and Social Media: Media and governance, opinion dynamics, filter bubbles, polarization

Abstract

We performed large, lab-in-the-field experiment (2,591 participants across 134 Honduran villages; ten rounds) and tracked how contribution behavior unfolds in fixed, anonymous groups of size five. Contribution separates early into two durable paths, one low and one high, with rare convergence thereafter. High-path players can be identified with strong accuracy early on. Groups that begin with an early majority of above-norm contributors (about 60%) are very likely finish high. The empirical finding of a bifurcation, consistent with the theory, shows that early, high contributions by socially central people steer groups onto, and help keep them on, a high-cooperation path.

Problem

• Investigates early divergence in public goods contributions into durable low or high paths.
• Examines how initial majority of above-norm contributors predicts long-term group cooperation outcomes.
• Identifies socially central individuals' early high contributions as key to sustaining high-cooperation paths.

Innovation

• Early majority of above-norm contributors
• Socially central people steer groups
• Bifurcation into durable high or low paths