Dry Laws and Homicides: Evidence from the São Paulo Metropolitan Area
利用双重差分法评估圣保罗大都市区实施禁酒法对暴力行为的影响，发现禁酒法使杀人案减少10%，对殴打和车祸死亡也有类似效果。
We use a difference-in-differences design to estimate the causal impact of the adoption of dry laws in the São Paulo Metropolitan Area (SPMA) on violent behaviour. Dry laws cause a 10% reduction in homicides. Similar impacts were found on battery and deaths by car accidents. Copyright © The Author(s). Journal compilation © Royal Economic Society 2009.