Communications for Statistical Applications and Methods

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Fig. 1.

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Fig. 1. The directed acyclic graphs (DAGs) showing six possible scenarios of association of X, Y, D, and sampling indicator S in the underlying population. (Figure taken from , with scenarios (A)–(F) originally considered and depicted in .)
Communications for Statistical Applications and Methods 2019;26:103-29 https://doi.org/10.29220/CSAM.2019.26.2.103
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