(A01) Analysis of income risk and inequality using administrative tax data

It is critical to understand the structure of income risks and inequality faced by households in detail to analyze desirable economic policies for redistribution and growth. While previous research has focused on analysis using survey data collected by governments and research institutes, economic research using administrative data has developed dramatically in Europe, the U.S., and other countries. Although survey data analysis helps us understand changes in the income processes by broad attributes of individuals, it is not often suitable to accurately capture the economic states of individuals at both ends of the income distribution, such as the very poor and wealthiest. It is important to understand the economic conditions of these groups to evaluate solutions to income inequality and poverty. In this study, we use administrative tax data and detailed information on households held by local governments, analyze the economic risks faced by individuals with different attributes, and conduct quantitative evaluations of the economic policies and welfare effects caused by economic risks and policy changes.