Identifiability of Path-Specific Effects ∗
Identifiability of Path-Specific Effects ∗
复制标题
特定路径效应的识别*
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
I. Shpitser
中科院分区：
文献类型：
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作者：
C. Avin;I. Shpitser
：当我们只想计算一个变量沿着图中沿着某些因果路径对另一个变量的影响时（换句话说，通过排除一组边的考虑），代表路径特定效应的反事实量就会出现。最近的一篇论文[Pearl，2001]详细介绍了一种方法，通过该方法，可以通过固定每个排除边的父节点的值来正式指定这种排除。在本文中，我们推导出简单的，图形化的条件下，路径特异性效应的实验可识别性，即条件下，路径特异性效应可以估计一致的数据从控制实验。当我们只想计算一个变量沿着图中沿着某些因果路径对另一个变量的影响时（换句话说，通过排除一组边的考虑），代表路径特异性效应的反事实量就会出现。最近的一篇论文[Pearl，2001]详细介绍了一种方法，通过该方法，可以通过固定每个排除边的父节点的值来正式指定这种排除艾德。在本文中，我们推导出简单的，图形化的条件，实验识别的路径特异性效应，即条件下，路径特异性效应可以估计一致的数据从控制实验。
: Counterfactual quantities representing pathspecific effects arise in cases where we are interested in computing the effect of one variable on another only along certain causal paths in the graph (in other words by excluding a set of edges from consideration). A recent paper [Pearl, 2001] details a method by which such an exclusion can be specified formally by fixing the value of the parent node of each excluded edge. In this paper we derive simple, graphical conditions for experimental identifiability of path-specific effects, namely, conditions under which path-specific effects can be estimated consistently from data obtained from controlled experiments. Abstract Counterfactual quantities representing path-specific effects arise in cases where we are interested in computing the effect of one variable on another only along certain causal paths in the graph (in other words by excluding a set of edges from consideration). A recent paper [Pearl, 2001] details a method by which such an exclusion can be specified formally by fixing the value of the parent node of each excluded edge. In this paper we derive simple, graphical conditions for experimental identifiability of path-specific effects, namely, conditions under which path-specific effects can be estimated consistently from data obtained from controlled experiments.