get.weights: Extract propensity score weights.

In twang: Toolkit for Weighting and Analysis of Nonequivalent Groups

Extract propensity score weights.

Description

Extracts propensity score weights from a ps or mnps object.

Usage

get.weights(ps1, stop.method = NULL, estimand = NULL, withSampW = TRUE)

Arguments

ps1	A ps or mnps object.
stop.method	Indicates which set of weights to retrieve from the ps object.
estimand	Indicates whether the weights are for the average treatment effect on the treated (ATT) or the average treatment effect on the population (ATE). By default, get.weights will use the estimand used to fit the ps object.
withSampW	Whether to return weights with sample weights multiplied in, if they were provided in the original ps or mnps call. Default: TRUE.

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.

Value

Returns a vector of weights.

See Also

ps, mnps

twang documentation built on Sept. 11, 2024, 8:47 p.m.