Regional integration boosts foreign investment by 27%, benefiting open countries.
Regional integration agreements (RIAs) increase foreign direct investment (FDI) by 27% from source countries. Countries benefit more if they are open and have different factor proportions. Market size growth due to integration attracts more FDI, but only countries with attractive FDI environments benefit. Some FDI may be diverted. Overall, regional integration attracts FDI, but benefits are not evenly distributed.