Professor Kai Zhao’s paper, “How Important Is Health Inequality for Lifetime Earnings Inequality?” (with Roozbeh Hosseini and Karen Kopecky), has been accepted for publication in the Review of Economic Studies, one of the top five academic journals in Economics.
In this paper, Professor Zhao and his coauthors examine an often-overlooked driver of economic inequality: health disparities. They show that health inequality is not just a reflection of broader economic disparities but a key driver of them.
Abstract:
Using a dynamic panel approach, we provide empirical evidence that negative health shocks significantly reduce earnings. The effect is primarily driven by the participation margin and is concentrated among the less educated and those in poor health. Next, we develop a life cycle model of labor supply featuring risky and heterogeneous frailty profiles that affect individuals’ productivity, likelihood of access to social insurance, disutility from work, mortality, and medical expenses. Individuals can either work or not work and apply for social security disability insurance (SSDI/SSI). Eliminating health inequality in our model reduces the variance of log lifetime (accumulated) earnings by 28 percent at age 55. About 60 percent of this effect is due to the impact of poor health on the probability of obtaining SSDI/SSI benefits. Despite this, we show that eliminating the SSDI/SSI program reduces ex ante welfare.