Out‐of‐area home purchase and U.S. internal migration
研究发现异地购房交易可作为人口迁移的代理指标，约35%的迁移者会进行异地购房，且异地购房每增加1%与迁移量增加约1%相关，并以纽约市疫情后人口外迁为例展示其高时空分辨率。
Abstract This study demonstrates that out‐of‐area (OOA) property transactions can serve as a proxy for migration. Using micro‐level transaction data, we document that about 35% of migrants make OOA property purchases. The goodness‐of‐fit between migration and OOA purchases is higher for aggregate migration measures and lower for migration flows between disaggregated areas. Furthermore, in most specifications, a one percent increase in OOA purchases is associated with an approximately one percent increase in migration. We characterize the monthly out‐migration from NYC zip codes to surrounding areas after the outbreak of the COVID‐19 pandemic to demonstrate the high temporal and spatial resolution of OOA transaction data.