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Figure 2 Chronological chart of Durankulak and the Balkan Copper Age (according to Bojadziev, 2002, p. 69; Govedarica, 2004, p. 227; Higham et al., 2007, p. 652; Lazarovici ar Lazarovici, 2007, pp. 158—159; Todorova, 2002a, p. 49). Beside the identification of social inequality, it is also important to measure inequality when analysing the social structure of the