All Hierarchical or Graphical Models for Generalized Linear
Model
Find all hierarchical models of specified generalized linear
model with information criterion (AIC, BIC, or AICc) within specified
cutoff of minimum value.  Alternatively, find all such graphical models.
Use branch and bound algorithm so we do not have to fit all models.

Fitting Generalized Linear Models Subject to Constraints
Sanjay Chaudhuri <sanjay@stat.nus.edu.sg>,
Mark S. Handcock <handcock@stat.washington.edu>,
Michael S. Rendall <mrendall@rand.org>
Fits generalized linear models where the parameters are subject to linear constraints. The model is specified by giving a symbolic description of the linear predictor, a description of the error distribution, and a matrix of constraints on the parameters.

c(person("Sanjay
Chaudhuri","Developer",email="sanjay@stat.nus.edu.sg"),
person("Mark S.
Handcock","Developer",email="handcock@stat.washington.edu"),
person("Michael S.
Rendall","Developer",email="mrendall@rand.org"))
Sanjay Chaudhuri <sanjay@stat.nus.edu.sg>, Mark S. Handcock
<handcock@stat.washington.edu>, Michael S. Rendall
<mrendall@rand.org>.
Fits generalized linear models where the parameters are
subject to linear constraints. The model is specified by giving
a symbolic description of the linear predictor, a description
of the error distribution, and a matrix of constraints on the
parameters.

c(person("Sanjay
Chaudhuri","Developer",role=c("aut","cre"),email="sanjay@stat.nus.edu.sg"),
person("Mark S.
Handcock","Developer",email="handcock@stat.ucla.edu"),
person("Michael S.
Rendall","Developer",email="mrendall@rand.org"))
Sanjay Chaudhuri <sanjay@stat.nus.edu.sg>, Mark S. Handcock
<handcock@stat.ucla.edu>, Michael S. Rendall
<mrendall@rand.org>.

c(person("Sanjay", "Chaudhuri", role=c("aut","cre"),email="sanjay@stat.nus.edu.sg"),
person("Mark S.", "Handcock", role="aut",email="handcock@stat.ucla.edu"),
person("Michael S.", "Rendall", role="ctb",email="mrendall@umd.edu"))
Sanjay Chaudhuri [aut, cre],
Mark S. Handcock [aut],
Michael S. Rendall [ctb]