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This article investigates the distributional implication of relative price movements in Australia. It proposes and applies a method of evaluating the nature and size of the inequality bias of price movements. In the process, the study introduces a new demographic demand model that yields sensible and statistically significant estimates of the general equivalence scale and the size economies of scale. The study finds that relative price movements in Australia during the 1990s had an inequality increasing bias and that this bias increased in the late 1990s and the first part of the new millennium. The disaggregated analysis of the inequality movements shows that the regressive nature of relative price changes affected the renters much more than non-renters. The study also provides evidence on the decomposition of overall inequality between demographic groups and compares the decomposition between the nominal and real expenditure inequalities.
