ierarchical variance. If the data in the levels are
dissimilar, weaker pooling will be reflected in higher hierarchical variance.</p>
<p>The following model encodes a hierarchical logistic regression model
with a hierarchical prior on the regression coefficients.</p>
<pre><code>data {
  int&lt;lower=1&gt; D;
  int&lt;lower=0&gt; N;
  int&lt;lower=1&gt; L;
  int&lt;lower=0,upper=1&gt; y[N];
  int&lt;lower=1,upper=L&gt; ll[N];
  row_vector[D] x[N];
}
parameters {
  real mu[D];
  real&lt;lower=0&gt; sigma[D];
