Does domestic migration adversely affect food security? Evidence from Vietnam

With a population of more than 100 million as of December 2022, food security remains a persistent challenge in Vietnam despite achieving a miracle of economic growth and social transformation in recent decades. Vietnam has also experienced a significant migration from rural areas into urban cities such as Ho Chi Minh City, Binh Duong, Dong Nai and Ba Ria - Vung Tau. The effects of domestic migration on food security have largely been neglected in the existing literature, particularly in Vietnam. This study investigates the impacts of domestic migration on food security using data from the Vietnam Household Living Standard Surveys. Food security is proxied by three dimensions: food expenditure, calorie consumption, and food diversity. The difference-in-difference and instrumental variable estimation techniques are used in this study to address endogeneity and selection bias. The empirical results reveal that domestic migration in Vietnam increases food expenditure and calorie consumption. We also find significant effects of wage, land and family characteristics such as education level and the number of family members on food security when different food groups are considered. Regional income, household headship and the number of children in a family mediate the relationship between domestic migration and food security in Vietnam.