rations should be set to
zero.</p>
<p>Most models that are written to be sampled without parameters will not
declare any parameters, instead putting anything parameter-like in the
data block. Nevertheless, it is possible to include parameters for
fixed-parameters sampling and initialize them in any of the usual ways
(randomly, fixed to zero on the unconstrained scale, or with
user-specified values). For example, <code>theta</code> in the example above
could be declared as a parameter and initialized as a pa