Frictional Sorting: The Impacts of Dual Constraints on Mobility and Housing Supply in China

Using an equilibrium sorting model and microdata from China, we evaluate the impacts of dual constraints on mobility and housing supply on workers’ sorting behavior, quantifying the welfare and distributional consequences. Counterfactual simulations show that lowering migration costs associated with institutional restrictions and migrant‐specific amenities would increase welfare and reduce inequality by moving workers from inland to coastal regions in China. These impacts depend on the housing supply elasticity in coastal regions. Similarly, the impacts of relaxing housing supply restrictions depend on mobility constraints. Results highlight the policy complementarities between reducing the two kinds of frictions.