arket utilization.</p>
</dd>
<dt>interest</dt><dd><p>Short-term rate of interest.</p>
</dd>
<dt>size</dt><dd><p>Mean real size of the representative economic unit (1939 = 100).</p>
</dd>
<dt>price</dt><dd><p>GNP price deflator (1958 = 100).</p>
</dd>
</dl>



<h3>Source</h3>

<p>The data are from Baltagi (2002).
</p>


<h3>References</h3>

<p>Baltagi, B.H. (2002). <em>Econometrics</em>, 3rd ed. Berlin, Springer. 
</p>
<p>Laffer, A.B. (1970). Trade Credit and the Money Market. <em>Journal of Political Econom