Labor income dynamics and the insurance from taxes, transfers, and the family
利用挪威人口面板数据，研究生命周期中劳动收入动态，发现税收转移系统对低收入群体收入冲击的缓冲作用大于配偶收入。
What do labor income dynamics look like over the life-cycle? What is the relative importance of persistent shocks, transitory shocks and heterogeneous profiles? To what extent do taxes, transfers and the family attenuate these various factors in the evolution of life-cycle inequality? In this paper, we use rich Norwegian population panel data to answer these important questions. We let individuals with different education levels have a separate income process; and within each skill group, we allow for non-stationarity in age and time, heterogeneous experience profiles, and shocks of varying persistence. We find that the income processes differ systematically by age, skill level and their interaction. To accurately describe labor income dynamics over the life-cycle, it is necessary to allow for heterogeneity by education levels and account for non-stationarity in age and time. Our findings suggest that the redistributive nature of the Norwegian tax–transfer system plays a key role in attenuating the magnitude and persistence of income shocks, especially among the low skilled. By comparison, spouse's income matters less for the dynamics of inequality over the life-cycle.