Description Usage Arguments Value References See Also Examples
The Vuong test is suitable to discriminate between two non-nested models.
1 2 3 4 5 6 7 8 |
x |
a first fitted model of class |
y |
a second fitted model of class |
type |
the kind of test to be computed, |
hyp |
a boolean, |
variance |
the variance is estimated using the |
matrix |
the W matrix can be computed using the general expression
|
an object of class "htest"
Vuong Q.H. (1989) Likelihood ratio tests for model selection and non-nested hypothesis, Econometrica, vol.57(2), pp.307-33.
1 2 3 4 5 6 7 8 9 | data("Interview", package = "mhurdle")
# dependent double hurdle model
dhm <- mhurdle(vacations ~ car + size | linc + linc2 | 0, Interview,
dist = "ln", h2 = TRUE, method = "bhhh", corr = TRUE)
# a double hurdle p-tobit model
ptm <- mhurdle(vacations ~ 0 | linc + linc2 | car + size, Interview,
dist = "ln", h2 = TRUE, method = "bhhh", corr = TRUE)
vuongtest(dhm, ptm)
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