Total causal effect
= Total causal effect
For binary exposure $A$, the total causal effect on an additive scale is $\mathbb E[Y(1)-Y(0)]$. With mediator potential outcome $M(a)$ and nested outcome $Y(a,m)$, consistency gives $Y(a)=Y(a,M(a))$.
= Total causal effect
For binary exposure $A$, the total causal effect on an additive scale is $\mathbb E[Y(1)-Y(0)]$. With mediator potential outcome $M(a)$ and nested outcome $Y(a,m)$, consistency gives $Y(a)=Y(a,M(a))$.