结构因果模型中的do算子分析

An Analysis of do-operator in Structural Causal Model

珀尔的形式化干预算子do(.)在他的结构因果模型中占有核心地位。然而由于许多学者对于do算子表达的干预性质及其符号语义有着不够充分的理解,一系列质疑的声音也随之出现。要回应这些质疑,我们应该在结构因果模型的理论背景和框架下剖析do算子本身,不仅要澄清其干预内涵和符号语义,也要厘清它在不同层级因果表达的限制所在。深入把握do算子,我们就能抓住结构因果模型的主要脉络及其关键点。

Pearl’s formalized intervention operator do(.) occupies a central place in his structural causal model.However,since many scholars have an insufficient understanding of the properties and symbolic semantics of the do-operator,a series of critical voices have emerged.To respond to these doubts,we should analyse the do-operator within the theoretical background and framework of the structural causal model,not only to clarify its intervention connotation and symbolic semantics,but also to clarify the limitations of its causal expression at different levels.By grasping the do-operator in depth,we will be able to grasp the main outline of the structural causal model and key points.