Comparing Shapes of Engel Curves Volume 2 Jena Economic Research Papers 2008-12-10 2008 2007 2008-093 Consumption Kernel method Rank correlation Curve shape We measure how different the shapes of Engel curves are across 59 commodity groups. The same analysis is carried out for their derivatives and variances. While Engel curves possess a relatively homogeneous shape, significantly more heterogeneity is present in derivatives and when particular sub-classes of income are considered. jportal_jpjournal_00000016 2008-12-10T07:52:18.169Z 2010-12-17T11:53:54.097Z