Sequential exchangeability
= Sequential exchangeability
For treatment history $\bar A_t$, observed history $H_t$, and final <potential outcome> $Y(\bar a)$, sequential exchangeability requires
$$
Y(\bar a)\mathrel\perp A_t\mid H_t
$$
at every treatment time. Together with <consistency of potential outcomes> and <positivity in causal inference>, it identifies longitudinal effects by <G-computation>.
= Sequential ignorability
{synonym}