Description Usage Author(s) References
Tests if A is used in the regression function, i.e. if E[Y|A,W] = E[Y|W] almost surely, or equivalently (under positivity) if E[Y|A=1,W] = E[Y|A=0,W] almost surely Returns an estimate of Psi, and a p-value If est.g is false, then just uses predefined function g0 NOTE: Theory all uses bounded Y, so if Y is not bounded then at least try to make sure most of its mass falls in the interval [-1,1] — can do this by scaling by a constant
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Alex Luedtke
Luedtke et al. 2017
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