A measure of the association between a <a href="search.pl?p=dependent variable">dependent variable</a> and one of the <a href="search.pl?p=explanatory variables">explanatory variables</a> when the effects of the other explanatory variables are held statistically constant. <a href="search.pl?p=Multiple regression">Multiple regression</a> provides partial correlations, which are useful in developing <a href="search.pl?p=econometric models">econometric models</a>. <o:p></o:p></P>