Dear All,

I am facing a question which will be really basic for statisticians, but at
this stage it seems impossible for me to solve, as an economist.
I am estimating a 2-way random effects model using the lme4 package and the
lmer function as depicted below:

model2<-lmer(ContributionTotal~
1+TimeTrend+HeterogenousDummy+(1|Group)+(1|Individual), data=FINALDATA)

The regression output does not provide goodness-of-fit measures for the
fitted regression. Particularly, I am seeking for Wald Chi-Square test for
this regression: that is this regression compared to a dummy regression
with only an intercept (if I am correct). This is one of the first things a
referee in an economics journal will require.

If you could help me to understand how to solve this problem, I would be
very grateful.

Thanks.

Sincerely, Armenak

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