ates, 2015).
For additional details, see the vignettes <em>Weighted Mixed Models: Adaptive Quadrature</em> and  <em>Weighted Mixed Models: Analytical Solution</em>
which provide extensive examples as well as a description of the mathematical basis of the estimation procedure and comparisons to model
specifications in other common software.
Notes:</p><ul><li><p>Standard errors of random effect variances are robust; see vignette for details.</p></li>
<li><p>To see the function that is maximized in the estimat