mtest: Arellano-Bond Test of Serial Correlation

In plm: Linear Models for Panel Data

Description

Test of serial correlation for models estimated by GMM

Usage

mtest(object, ...)

## S3 method for class 'pgmm'
mtest(object, order = 1, vcov = NULL, ...)

Arguments

object	an object of class "pgmm",
...	further arguments (currently unused).
order	the order of the serial correlation (1 or 2),
vcov	a matrix of covariance for the coefficients or a function to compute it,

Details

The Arellano–Bond test is a test of correlation based on the residuals of the estimation. By default, the computation is done with the standard covariance matrix of the coefficients. A robust estimator of this covariance matrix can be supplied with the vcov argument.

Value

An object of class "htest".

Author(s)

Yves Croissant

References

\insertCite

AREL:BOND:91plm

See Also

pgmm()

Examples

data("EmplUK", package = "plm")
ar <- pgmm(log(emp) ~ lag(log(emp), 1:2) + lag(log(wage), 0:1) +
           lag(log(capital), 0:2) + lag(log(output), 0:2) | lag(log(emp), 2:99),
           data = EmplUK, effect = "twoways", model = "twosteps")
mtest(ar, order = 1)
mtest(ar, order = 2, vcov = vcovHC)

plm documentation built on Sept. 21, 2021, 3:01 p.m.