Path-Specific Effects

Naftali Weinberger

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

A cause may influence its effect via multiple paths. Paradigmatically (Hesslow, 1974), taking birth control pills both decreases one’s risk of thrombosis by preventing pregnancy and increases it by producing a blood chemical. Building on Pearl (2001), I explicate the notion of a path-specific effect. Roughly, a path-specific effect of C on E via path P is the degree to which a change in C would change E were they to be transmitted only via P. Facts about such effects may be gleaned from the structural equations commonly used to represent the causal relationships among variables. I contrast my analysis of the Hesslow case with those given by theorists of probabilistic causality, who mistakenly link it to issues of causal heterogeneity, token-causation and indeterminism. The reason
probabilistic theories misdiagnose this case is that they pay inadequate attention to the structural relationships among variables.
Original languageEnglish
Pages (from-to)53-76
JournalThe British Journal for Philosophy of Science
Volume70
Issue number1
Publication statusPublished - 2019

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