The effects of financial deepening on income inequality based on grey incidence analysis: Empirical evidence from China

Purpose – The purpose of this paper is to clarify the relationship between income inequality and financial deepening. The majority of theoretical studies on the relationship between them argue that financial deepening has a positive effect on the income inequality. This paper aims to study the case of China, and explores whether the effects of financial deepening on income inequality varies between urban residents and rural residents. Design/methodology/approach – Using the grey incidence analysis, this paper first calculates the degree of grey incidence between dependent variables, i.e. per capita disposable income of urban residents, per capita net income of rural residents and overall Theil Inequality Index for China, and independent variables, depth of credit, depth of direct financing and depth of insurance. Next, multiple non-linear regression is introduced to build the model. With the method of unit root test and co-integration test, some equations are given to show the clear relationship among the...