fips code (character)</p></dd>
  <dt>	STFIPS	</dt><dd><p>State fips code (numeric)</p></dd>
  <dt>	COFIPS	</dt><dd><p>County fips code (numeric)</p></dd>
  <dt>	FIPSNO	</dt><dd><p>Fips code as numeric variable</p></dd>
  <dt>	SOUTH	</dt><dd><p>Dummy variable for Southern counties  (South = 1)</p></dd>
  <dt>	HRyy	</dt><dd><p>Homicide rate per 100,000 for the years yy: 1960, 1970, 1980 and 1990.</p></dd>
  <dt>	HCyy	</dt><dd><p>Homicide count, three year average centered on yy: 1960, 1970, 1980, 1990</p></dd