Huber, Martin; Lechner, Michael; Wunsch, Conny; Walter, … - 2009
,..., | ,= ∀∈nullYYDXxxχ
where denotes conditional independence and null X is the vector of observed covariates (see
Imbens, 2000, and … outcomes,
and covariates only:
[ ]
|', |, ,,'{0,12,3},⎡⎤= == = =∀ ∈ ∀∈
⎣⎦
d
EY DdX x EYDdX x dd xχ
Effect identification … of the effects of the programmes compared to nonparticipation (ATET)
also requires that there is common support in X …