240102</span></span>
<span><span class="co">#&gt; 531419: MCID3112870009  19983 240102</span></span></code></pre></div>
<p><em>Filter.</em>   We remove observations of undecided/unspecified
(CIP 999999). Any rows remaining for the same IDs will have CIPs of
degree-granting program (or FYE), allowing us to infer their preferred
starting programs. (A required step for completeness, but unnecessary
when using the practice data.)</p>
<div class="sourceCode" id="cb6"><pre class="downlit sourceCode r">
<code cla