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<li><p><strong>rresc:</strong> real residential construction</p></li>
<li><p><strong>rnonc:</strong> real nonres. construction</p></li>
<li><p><strong>ip:</strong> aggregate index of indus. prod.</p></li>
<li><p><strong>rdefs:</strong> real defense spending</p></li>
<li><p><strong>milemp:</strong> military employment</p></li>
<li><p><strong>gprc:</strong> log(prccem) - log(prccem[_n-1])</p></li>
<li><p><strong>gcem:</strong> log(ipcem) - log(ipcem[_n-1])</p></li>
<li><p><strong>gprcpet:</strong> log(prcpe