Calculates a simple version of Pan's QIC for a GEE model defined by
a vector of regression coefficients.
Usage
QIC(Y, X, b, family = "gaussian")
Arguments
Y
A vector of outcomes.
X
A matrix of predictors.
b
A vector of regression coefficients (e.g., a row from the coefficient matrix produced by geeboost)
family
Version of QIC to implement, for either "gaussian", "binomial" or "poisson" outcomes.
Should match the family argument used in the original boosting algorithm.