| Income distribution determines whether a country can maintain harmony and stability.Our country is in the key period of economic transformation, but faced with a series ofproblems such as unfair distribution. These problems are extremely apt to cause socialconflicts, and thus related to the sustainable development of economy and long-termstability of social life.In recent years, the government has issued a series of policies to adjust the distributionpattern of national income. Also, academic discussion on the issue of income distributionhas never stopped, more and more scholars directly focus on the income distributionpattern and the measure of the income groups. This paper introduces the theory ofmixture distribution to fit the income probability function curve, and proposes a newmeasure of income groups using fractiles of subpopulation distributions in the mixturemodel, which fully considers the income heterogeneity. Shapley-value decompositionrule is also used to probe into interaction of different income groups. Based on the CHNSdata from1993to2011, it shows that mixture distribution can fit the income data welland effectively describe the features of multimodality. And the interactions amongdifferent income groups in rural and urban areas are roughly the same: for thelow-income group, the increasing of its income level can promote the reduction of itsscale and the expansion of other groups’ scales; for the middle-income group, the risingof its income level can also promote the reduction of the scale of the low-income group,and at the same time help reduce the scale of the lower middle group and expand its ownscale; for the high-income group, its rising level of income mainly contributes to theexpansion of its own scale; and besides, in most cases, the widening income gap in thegroup would hinder the formation of the ideal ‘olive shape’ social structure. Urban-ruraldifferences in interactions, however, only exist in the directions or relative magnitudes ofa minority of effects. |
PDF Full Text Request