corporations in finance, 
insurance and real estate. Source: 
&quot;U.S. Direct Investment Abroad: 1982 
Benchmark Survey data.&quot; Table III.C 6.
</p>
</dd>
<dt>gdp</dt><dd>
<p>gross domestic product. Source: &quot;World 
Bank, World Development Report 1984.&quot; Table 
3. (This variable is  scaled by a factor of 
1/100,000)
</p>
</dd>
<dt>sales</dt><dd><p>sales made by the majority owned foreign affiliates of nonbank U.S. parents in finance, insurance and real estate. Source: &quot;U.S. Direct Investme