s="er">~</span> years, <span class="st">&quot;2-1&quot;</span><span class="ot">=</span><span class="er">~</span>years, <span class="st">&quot;2-4&quot;</span><span class="ot">=</span><span class="er">~</span>years, <span class="st">&quot;3-4&quot;</span><span class="ot">=</span><span class="er">~</span>years), </span>
<span id="cb120-3"><a href="timedep.html#cb120-3" aria-hidden="true" tabindex="-1"></a>                   <span class="at">constraint =</span> <span class="fu">list</span>(<span class="at">yea