Description Usage Arguments Value References See Also Examples
Stratification on GPS with multilevel treatments
1 2 | multilevelGPSStratification(Y, W, X, NS, GPSM = "multinomiallogisticReg",
linearp = 0, nboot)
|
Y |
A continuous response vector (1 x n) |
W |
A treatment vector (1 x n) with numerical values indicating treatment groups |
X |
A covariate matrix (p x n) with no intercept |
NS |
The number of strata: (only required in the function
|
GPSM |
An indicator of the methods used for estimating GPS, options include "multinomiallogisticReg", "ordinallogisticReg", and "existing" |
linearp |
An indicator of subclassification on GPS (=0) or linear
predictor of GPS (=1): (only required in the function
|
nboot |
The number of boot replicates for variance estimation: (only
required in the function |
A list with two elements,
tauestimate
, varestimate
, where tauestimate
is a
vector of estimates for pairwise treatment effects, and varestimate
is a vector of variance estimates, using bootstrapping method.
Yang, S., Imbens G. W., Cui, Z., Faries, D. E., & Kadziola, Z. (2016) Propensity Score Matching and Subclassification in Observational Studies with Multi-Level Treatments. Biometrics, 72, 1055-1065. https://doi.org/10.1111/biom.12505
Abadie, A., & Imbens, G. W. (2006). Large sample properties of matching estimators for average treatment effects. Econometrica, 74(1), 235-267. https://doi.org/10.1111/j.1468-0262.2006.00655.x
Abadie, A., & Imbens, G. W. (2016). Matching on the estimated propensity score. Econometrica, 84(2), 781-807. https://doi.org/10.3982/ECTA11293
multilevelGPSMatch
; multilevelMatchX
1 2 3 4 5 6 7 8 9 10 11 | simulated_data <- multilevelMatching::simulated_data
set.seed(123)
multilevelGPSStratification(
Y = simulated_data$outcome ,
W = simulated_data$treatment,
X = simulated_data[ ,names(simulated_data) %in% paste0("covar", 1:6)],
GPSM = "multinomiallogisticReg",
NS = 5,
linearp = TRUE,
nboot = 10
)
|
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