Concordance analysis of importance measure
2008
At first glance it seems that the ranking produced by the four IMs are different or at least are not completely equal. In this paper we assess the global agreement among the IM rankings on the basis of Kendall’s coefficient of concordance W (Siegel & Castellan, 1988). Kendall’s W is a non-parametric statistic that can be used for assessing agreement among different judges or IM. That isKendall’s coefficient of concordance provides a statistical way to formally assess the similarity among IM ranks. If the test statistic W is 1, then all the IM are complete concordant and each IM rank the components in a similar way. If W is 0, then there is no overall trend of agreement among the IMs, and their ranks may be regarded as essentially different. Intermediate values ofW indicate a greater or lesser degree of unanimity among the various IMs.