vuong.test {GJRM} | R Documentation |
Vuong test
Description
The Vuong test is likelihood-ratio-based tests that can be used for choosing between two non-nested models.
Usage
vuong.test(obj1, obj2, sig.lev = 0.05)
Arguments
obj1 , obj2 |
Objects of the two fitted bivariate non-nested models. |
sig.lev |
Significance level used for testing. |
Details
The Vuong test is a likelihood-ratio-based tests for model selection that use the Kullback-Leibler information criterion, and that can be employed for choosing between two bivariate models which are non-nested.
The null hypothesis is that the two models are equally close to the actual model, whereas
the alternative is that one model is closer. The test follows asymptotically a standard normal
distribution under the null. Assume that the critical region is (-c,c)
, where c
is typically set to 1.96. If the value
of the test is higher than c
then we reject the null hypothesis
that the models are equivalent in favor of model obj1
. Viceversa if the value is smaller than c
. If
the value falls in [-c,c]
then we cannot discriminate between the two competing models given the data.
Value
It returns a decision.
Author(s)
Maintainer: Giampiero Marra giampiero.marra@ucl.ac.uk
References
Vuong Q.H. (1989), Likelihood Ratio Tests for Model Selection and Non-Nested Hypotheses. Econometrica, 57(2), 307-333.
Examples
## see examples for gjrm