# \donttest{
# generate data
data(df1, package = 'ptmixed')
# estimate one of the following models: a Poisson-Tweedie or
# negative binomial GLMM (using ptmixed() or nbmixed()), or
# a Poisson-Tweedie or negative binomial GLM (using ptglm()
# or nbgml())
fit1 = nbglm(formula = y ~ group*time, data = df1)
# define L for beta2 = beta4 = 0
L = matrix(0, nrow = 2, ncol = 4)
L[1, 2] = L[2, 4] = 1
# compute multivariate Wald test
wald.test(obj = fit1, L = L, k = NULL)
# }
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