chen_poisson: Chen & Chen Poisson

In ipd: Inference on Predicted Data

Chen & Chen Poisson

Description

Helper function for Chen & Chen Poisson regression estimation.

Usage

chen_poisson(X_l, Y_l, f_l, X_u, f_u, intercept = TRUE)

Arguments

X_l	(matrix): n x p matrix of covariates in the labeled data.
Y_l	(vector): n-vector of labeled outcomes.
f_l	(vector): n-vector of predictions in the labeled data.
X_u	(matrix): N x p matrix of covariates in the unlabeled data.
f_u	(vector): N-vector of predictions in the unlabeled data.
intercept	(Logical): Do the design matrices include intercept columns? Default is TRUE.

Details

Another look at statistical inference with machine learning-imputed data (Gronsbell et al., 2026) \Sexpr[results=rd]{tools:::Rd_expr_doi("10.48550/arXiv.2411.19908")}

Value

(list): A list containing the following:

est

(vector): vector of Chen & Chen Poisson regression coefficient estimates.

se

(vector): vector of standard errors of the coefficients.

Examples

dat <- simdat(model = "poisson")

form <- Y - f ~ X1

X_l <- model.matrix(form, data = dat[dat$set_label == "labeled", ])

Y_l <- dat[dat$set_label == "labeled", all.vars(form)[1]] |>
  matrix(ncol = 1)

f_l <- dat[dat$set_label == "labeled", all.vars(form)[2]] |>
  matrix(ncol = 1)

X_u <- model.matrix(form, data = dat[dat$set_label == "unlabeled", ])

f_u <- dat[dat$set_label == "unlabeled", all.vars(form)[2]] |>
  matrix(ncol = 1)

chen_poisson(X_l, Y_l, f_l, X_u, f_u, intercept = TRUE)

ipd documentation built on March 11, 2026, 5:07 p.m.