Education and labor mobility are key drivers in the production of human capital, fundamental to economic development. In the U.S., the varying skill production efficiencies of state-specific education systems and the dynamics of worker migration shape regional human capital, influencing economic outcomes at both the state and national levels. This paper develops a novel dynamic spatial general equilibrium model with overlapping generation framework in which heterogeneous individuals accumulate human capital and move across regions. Calibrated to the U.S. economy, the model illustrates how variations in education efficiency lead to substantial cross-state income disparities and shows that internal migration can notably boost output in states with lower education efficiencies. At the national level, free mobility of workers yields a 6.9% output gain. Moreover, the model suggests that variations in human capital account for 46.6% of the state variation per capita output. Applying the calibrated model to analyze the Obama Administration's Race to the Top initiative finds that the $4.1 billion grant spurred a 0.2% increase in U.S. GDP, mostly benefiting the grant-winning states and their neighbors. Additionally, alternative grant allocation experiments show that strategic reallocation of education grants, considering regional skill production efficiencies, could further increase national GDP gains without necessarily worsening regional income disparities.

We investigate how the China shock affects workers' health through optimal health investment decisions. We empirically estimate the elasticity of import penetration per worker on future good health probability. In our quantitative model, workers make decisions on their health investments based on sickness shocks, income, and insurance status. They have the option to either partially treat sickness or invest in their health beyond just treating the sickness. In our quantitative evaluation of the China shock, we find that there is little (substantial) change in the probability of future good health of employed workers whose health is initially bad (good), in line with our empirical estimates. In addition, uninsured workers who encounter a severe sickness shock experience a significant decline in their health. Overall, the health investment mechanism accounts for over two-fifths of the estimated empirical elasticity, implying that the China shock pushes nearly half a million individuals in U.S. manufacturing into bad health through this mechanism. In our counterfactuals, we find that universal health insurance would have remedied over 80% of the adverse health effects from the China shock, with large heterogeneity across sickness shocks and across commuting zones with varying degrees of exposure to import penetration.

This paper explores the effect of two different types of land use policies on regional economies by using regional level data of South Korea. We analyze the effect of conventional land-use restrictions in existing cities as well as the effect of unique land-supply policies, motivated by the South Korean government’s 2nd New Town Project which built new cities from the scratch, supplying 666,000 houses near Seoul Metropolitan Area (SMA). We estimate the effect of such policies on the aggregate and regional economies, considering both the efficiency gain from the resource reallocation and externalities from regional decline. If the government introduces tighter land-use restrictions in SMA and relaxes land-use restrictions in other regions, regional population will more evenly distribute at the cost of aggregate GDP loss and universal housing price increases. Our back-of-the-envelope calculation indicates that the 2nd New Town Project was cost effective as it permanently increased steady state real aggregate GDP flow by 0.4%, for the one-time cost amounting 4.05% of GDP. It however exacerbated regional decline by decreasing overall rural population share by 4%.

Compulsory public education is a common policy tool to achieve greater participation in education, particularly from marginalized groups. The COVID-19 pandemic brought unprecedented school closures around the globe. Households seek their own mitigation strategy against education loss via private substitutes. We use the COVID-19 response of South Korea as a laboratory for investigating the effects of pandemic-induced school closure on parental investment and educational outcomes. Specifically, we exploit the school-level variations in in-person learning days driven by government and local authorities. Combining administrative data and longitudinal survey, our fixed effects regression identifies that losing 10 additional days implies a 9.5% increase in private education expenditure. In addition, we build and estimate a structural model tournament to quantify the impact of school closure on educational inequalities. A counterfactual experiment suggests that a $450 voucher for private tutoring may compensate for the test score loss caused by a 20-day loss of in-person schooling. Our results shed light on how households make schooling decisions and have implications on the longer-run educational inequality induced by the pandemic. Methodologically, we propose an estimation algorithm that tightly links the natural experiment estimates and the structural model.