Extracts propensity score weights from a ps object.
Usage
get.weights(ps1,
type = c("ATT", "ATE")[1],
stop.method = NULL)
Arguments
ps1
a ps object
type
indicates whether the weights are for the average treatment effect on the treated (ATT) or the average treatment effect on the population (ATE)
stop.method
indicates which set of weights to retrieve from the ps object
Value
a vector of weights
Details
Weights for ATT are 1 for the treatment cases and p/(1-p) for the control cases.
Weights for ATE are 1/p for the treatment cases and 1/(1-p) for the control cases.