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arXiv 2510.04785physics.soc-phecon.GNq-fin.EC
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社会传染中什么会改变阈值分布?

What shifts threshold distributions in social contagions?

University of Zurich(苏黎世大学);University Research Priority Program on Social Networks(社会网络研究优先项目);Corvinus University of Budapest(布达佩斯科维努斯大学)

Luca Lazzaro, Manuel S. Mariani, René Algesheimer, Radu Tanase

AI总结:

该研究通过带激励的在线实验发现,产品特征与个体特征均会改变社会传染的阈值分布,阈值分布是社会传染模型的微观基础,相关发现有助于理解网络结构对社会传染的影响。

摘要:

社会传染中的个体阈值,指的是在个体决定采用某一新产品或行为前,必须已有多少比例的他人采用该产品或行为。然而,在特定的选择场景和人群中,我们很少知晓经验性的阈值分布,也不清楚导致其异质性的原因,这限制了我们预测扩散动态和设计有效网络干预措施的能力。为解决这一问题,我们开展了一项带激励的在线实验来测量阈值,实验中参与者需对吸引力和收益不确定性各异的产品做出采用决策。结果表明,产品特征会改变阈值分布:较低的吸引力和较高的不确定性会提升阈值;而个体特征对于解释阈值异质性依然至关重要。随后,我们利用数据驱动的模拟显示,产品特征和个体特征都会调节社会传染中弱关系的影响。综上,阈值分布是社会传染模型的行为微观基础,确定阈值的经验关联因素对于理解网络结构如何影响社会传染至关重要。

英文摘要:

Individual thresholds in social contagions capture what fraction of others must adopt a new product or behavior before an individual adopts it. Yet in a given choice context and population, we rarely know the empirical threshold distribution or what explains its heterogeneity. This limits the ability to predict diffusion dynamics and design effective network interventions. We address this by measuring thresholds with an incentivized online experiment in which participants make adoption decisions for products that vary in attractiveness and payoff uncertainty. The results show that product characteristics shift threshold distributions: lower attractiveness and higher uncertainty increase thresholds. Individual characteristics, however, remain essential for explaining threshold heterogeneity. We then use data-driven simulations to show that both product characteristics and individual characteristics moderate the effect of long ties in social contagions. In sum, the threshold distribution is the behavioral microfoundation of social contagion models and identifying empirical correlates of thresholds is crucial for understanding how network structure affects social contagions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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