#g-estimation

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• Dynamic Treatment Regimes (DTR / OTR) A DTR is a sequence of decision rules $\{d_t(H_t)\}_{t=1}^T$ mapping the accumulated history $H_t$ (covariates, prior treatments, intermediate outcomes) to a treatment. The optimal treatment regime (OTR) maximizes the expected long-term outcome $E[Y^{d}]$. Estimation: