Note(s): Robust standard errors in parentheses clustered at the altitude in meters to sea level. All the regressions include governorates and child age in months dummies, mother's education, father's education, mother's age, mother's age square, household wealth, birth order, number of children under five, household size, rural residence, and mother works, *p < 0.1, **p < 0.05, ***p < 0.01