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AI 根据所提供的论文材料归类:摘要明确研究干预数据下的因果图识别与学习;图结构不等同于经济网络干扰。

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关注这篇论文的作者
F Castelletti
S Peluso

利用干预实验数据贝叶斯学习网络结构

研究问题
当观察数据与随机干预产生的数据并存时,如何利用干预提升因果有向无环图的可识别性,并开展贝叶斯结构推断?
方法与思路
作者设计先验设定程序,获得图模型边际似然的闭式表达及干预后评分等价性,并用马尔可夫链蒙特卡洛探索图空间。
材料陈述的贡献
摘要称,在高斯设定下建立真实网络的后验比一致性,允许干预变量分布及两类样本相对渐近占比变化,并以模拟验证。
阅读关注点
应核对随机干预的形式、干预后等价类、先验与闭式似然的构造,以及后验比一致性对样本量和图结构的条件。
阅读边界
仅据所给 Crossref 摘要,无法判断具体干预识别条件,也不能将高斯设定的恢复结果推广为任意分布或有限样本保证。

原文摘要

Summary Directed acyclic graphs provide an effective framework for learning causal relationships among variables given multivariate observations. Under pure observational data, directed acyclic graphs encoding the same conditional independencies cannot be distinguished and are collected into Markov equivalence classes. In many contexts, however, observational measurements are supplemented by interventional data that improve directed acyclic graph identifiability and enhance causal effect estimation. We propose a Bayesian framework for multivariate data partially generated after stochastic interventions. To this end, we introduce an effective prior elicitation procedure leading to a closed-form expression for the directed acyclic graph marginal likelihood and guaranteeing score equivalence among directed acyclic graphs that are Markov equivalent post intervention. Under the Gaussian setting, we show, in terms of posterior ratio consistency, that the true network will be asymptotically recovered, regardless of the specific distribution of the intervened variables and of the relative asymptotic dominance between observational and interventional measurements. We validate our theoretical results via simulation and we implement a Markov chain Monte Carlo sampler for posterior inference on the space of directed acyclic graphs on both synthetic and biological protein expression data.

笔记与分组
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