mice (version 3.6.0)

D2: Compare two nested models using D2-statistic

Description

Compare two nested models using D2-statistic

Usage

D2(fit1, fit0 = NULL, df.com = NULL, use = "wald", ...)

Arguments

fit1

An object of class mira, produced by with().

fit0

An object of class mira, produced by with(). The model in fit0 is a nested within fit1. The default null model fit0 = NULL compares fit1 to the intercept-only model.

df.com

A single number or a numeric vector denoting the complete-data degrees of freedom for the hypothesis test. If not specified, it is set equal to df.residual of model fit1. Not used for method D2().

use

A character string denoting Wald- or likelihood-based based tests. Can be either "wald" or "likelihood". Only used if method="D2".

...

Not used.

Details

The D2 method does not use the df.com parameter, so it does not pass it down to testModels. This prevents the following warning thrown by testModels: Complete-data degrees of freedom are not available for use with 'D2', and thus were ignored.