R: Stratification implementation for bootstrapping.
boot.strata
R Documentation
Stratification implementation for bootstrapping.
Description
Stratification implementation for bootstrapping.
Usage
boot.strata(Tr, Y, X, X.trans, formu, nstrata = 5, ...)
Arguments
Tr
vector indicating treatment assignment.
Y
vector of outcome.
X
matrix or data frame of covariates.
X.trans
a data frame of X with factors recoded. See cv.trans.psa
formu
the formula to use to estimate propensity scores. Note that the
dependent varaible (i.e. treatment variable) name will be updated using
the Tr vector.
nstrata
number of strata to divide the propensity scores.
...
other parameters passed from PSAboot
Value
a list with three elements:
summary
a named numeric vector (with at minimum estimate,
ci.min, and ci.max but other values allowed)
balance
a named numeric vector with one element per
covariate listed in X.trans representing a balance statistic
(usually standardized effect size after adjustment)
details
an arbitrary object that contains the full results of the
analysis
providing 
.