, where <code>n</code> corresponds to the
baseline "do nothing" project. This means that the probability
of a feature persisting if a project is allocated to a feature
depends on (i) the probability of the project succeeding, (ii) the
probability of the feature persisting if the project does not fail,
and (iii) the probability of the feature persisting even if the project
fails. Otherwise, if the argument is set to <code>FALSE</code>, then
\(Q_{fj} = P_{j} \times B_{fj}\).</p>
<p>The binary control variable