Arguments
Y
a vector containing the outcome.
X
a matrix containing the covariates excluding the treatment.
D
a vector containing the binary treatment.
Z
a vector containing the binary instrument for the endogenous treatment.
method
the estimation method to be used. The default is ``LS", standing for least squares. ``ML", standing for maximum likelihood, is an alternative.
AME
whether average marginal effects (AME) should be reported. The default is FALSE, in which case marginal effects at the means (MEM) are reported.
optimizer
the optimization algorithm for the ML method. It should be one of ``Nelder-Mead", ``BFGS", ``CG", ``L-BFGS-B", ``SANN", or ``Brent". See optim in R for more detail.
zProb
a vector containing the probability of receiving the treatment inducement (i.e., instrument = 1) that have been estimated by semiparametrical methods.