med parameters</code> block
behave similarly to each other. Both allow new variables to be
declared and then defined through a sequence of statements. Because
variables scope over every statement that follows them, transformed
data variables may be defined in terms of the data variables.</p>
<p>Before generating any draws, data variables are read in, then the
transformed data variables are declared and the associated statements
executed to define them. This means the statements in the transformed
data block