Emergent contagion complexity: Disentangling mechanistic complexity from correlated heterogeneity
涌现的传播复杂性:区分机制复杂性与相关异质性AI 解读 ↓
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涌现的传播复杂性:区分机制复杂性与相关异质性AI 解读 ↓
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Simple and complex contagions differ mechanistically; multiple exposures act synergistically in the latter but independently in the former. Yet correlated mixtures of simple contagions may appear complex when inferring global contagion rules, a phenomenon we call "emergent complexity." We present a measure of contagion complexity and an inferential framework for estimating mixtures of nonparametric contagion rules from time-series data. Our work reframes past studies on complex contagion by offering heterogeneous mixtures of simple contagions as an alternative explanation.
具有分组边效应的降秩网络自回归
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图辅助分组网络自回归模型:贝叶斯非参数方法
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图结构辅助的分组网络自回归模型:贝叶斯非参数方法
Vector autoregression model is ubiquitous in classical time series data analysis. With the rapid advance of social network sites, time series data over latent graph is becoming increasingly popular. In this paper, we develop a novel Bayesian grouped network autoregression model to simultaneously estimate group information (number of groups and group configurations) and group-wise parameters. Specifically, a graphically assisted Chinese restaurant process is incorporated…
使用单调单指标多元自回归模型改进预测与网络估计
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金融网络动态与持久性的估计:英镑货币市场应用
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