the gini coefficients take into account labour earnings only the precise definition of labour earnings differs across countries see fournier and koske for details the value for the oecd is calculated as an unweighted average across all oecd countries for which data are available the analysis below uses household data from the oecd income distribution and poverty database the concentration coefficient of any earnings component is computed in the same way as the gini coefficient with the only difference being that households are not ranked by the value of the earnings hut rather by their equivalised disposable income the concentration coefficient tends to be lower than the gini because households with low equivalised disposable income might have high earnings