c(
person("Michael", "Wurm", email = "wurm@uwalumni.com", role = c("aut", "cre")),
person("Paul", "Rathouz", email = "rathouz@biostat.wisc.edu", role = "aut"))

Fits a generalized linear density ratio model (GLDRM).
A GLDRM is a semiparametric generalized linear model.
In contrast to a GLM, which assumes a particular exponential family distribution,
the GLDRM uses a semiparametric likelihood to estimate the reference distribution.
The reference distribution may be any discrete, continuous, or mixed exponential
family distribution. The model parameters, which include both the regression
coefficients and the cdf of the unspecified reference distribution, are estimated
by maximizing a semiparametric likelihood. Regression coefficients are estimated
with no loss of efficiency, i.e. the asymptotic variance is the same as if the
true exponential family distribution were known.
Huang (2014) <doi:10.1080/01621459.2013.824892>.
Huang and Rathouz (2012) <doi:10.1093/biomet/asr075>.
Rathouz and Gao (2008) <doi:10.1093/biostatistics/kxn030>.

Learning interactions via hierarchical group-lasso
regularization
Fits linear pairwise-interaction models that satisfy strong hierarchy: if an interaction coefficient is estimated to be nonzero, then its two associated main effects also have nonzero estimated coefficients. Accommodates categorical variables (factors) with arbitrary numbers of levels, continuous variables, and combinations thereof. Implements the machinery described in the paper below.

Learning Interactions via Hierarchical Group-Lasso
Regularization
Group-Lasso INTERaction-NET. Fits linear pairwise-interaction models that satisfy strong hierarchy: if an interaction coefficient is estimated to be nonzero, then its two associated main effects also have nonzero estimated coefficients. Accommodates categorical variables (factors) with arbitrary numbers of levels, continuous variables, and combinations thereof. Implements the machinery described in the paper "Learning interactions via hierarchical group-lasso regularization" (JCGS 2014).