When this procedure is replicated for H (the gross headcount ratio), Kendall's Tau can be seen to vary between 0.723 and 0.982, while Spearman's Rho ranges between 0.849 and 0.997. The Alkire-Foster approach proposes: (i) an identification method pk, which links and extends traditional intersection and union approaches, and (ii) a class of poverty measures Ma. This method of identification and aggregation, and the basic measures that result from both steps (the headcount ratio, intensity and the adjusted headcount ratio), are highly suited to ordinal data.