Minimize a differentiable function subject to all the variables being non-negative (i.e. >= 0),
using a Conjugate-Gradient algorithm based on a modified Polak-Ribiere-Polyak formula as described in
(Li, Can, 2013, <https://www.hindawi.com/journals/jam/2013/986317/abs/>).

Minimize a differentiable function subject to all the variables being non-negative (i.e. >= 0),
using a Conjugate-Gradient algorithm based on a modified Polak-Rubiere-Polyak formula as described in
(Li, Can, 2013, <https://www.hindawi.com/journals/jam/2013/986317/abs/>).

Testing non-nested models via theory supplied by Vuong (1989).
Includes tests of model distinguishability and of model fit that
can be applied to both nested and non-nested models.  Also includes
functionality to obtain confidence intervals associated with AIC and BIC.

Object-oriented testing and comparison of pairs of models,
using theory supplied by Vuong (1989).  vuongtest includes
tests of model equivalence, likelihood ratio-like
tests of non-nested models, and confidence intervals associated with
information criteria.

Testing non-nested models via theory supplied by Vuong (1989).
Includes tests of model distinguishability and of model fit that can be applied
to both nested and non-nested models. Also includes functionality to obtain
confidence intervals associated with AIC and BIC. This material is based on work
supported by the National Science Foundation under Grant Number SES-1061334.
CompQuadForm, mvtnorm, lavaan (>= 0.5-20), sandwich

Testing non-nested models via theory supplied by Vuong (1989) <DOI:10.2307/1912557>.
Includes tests of model distinguishability and of model fit that can be applied
to both nested and non-nested models. Also includes functionality to obtain
confidence intervals associated with AIC and BIC. This material is based on work
supported by the National Science Foundation under Grant Number SES-1061334.
CompQuadForm, mvtnorm, lavaan (>= 0.5-21), sandwich

c(person(given = "Edgar", family = "Merkle",
role = c("aut","cre"), email = "merklee@missouri.edu"),
person(given = "Dongjun", family = "You", role = "aut"),
person(given = "Lennart", family = "Schneider", role = "ctb"),
person(given = "Seongho", family = "Bae", role = "ctb")
)
Testing non-nested models via theory supplied by Vuong (1989) <DOI:10.2307/1912557>.
Includes tests of model distinguishability and of model fit that can be applied
to both nested and non-nested models. Also includes functionality to obtain
confidence intervals associated with AIC and BIC. This material is partially based on
work supported by the National Science Foundation under Grant Number SES-1061334.
CompQuadForm, mvtnorm, lavaan (>= 0.5-23.1097), sandwich
Edgar Merkle [aut, cre],
Dongjun You [aut],
Lennart Schneider [ctb],
Seongho Bae [ctb]