1. Read the paper by Staatz et al. (1990) and describe how the food security index is constructed in their paper. What would be the impact of technology adoption in Malawi on food security using that index? 2. Do hybrid maize adopters have lower incidence of child malnutrition than non-adopters in Zambia? Explain. Consider the following data on Food Security for Adopters (1) and Non- Adopters (0). Use the commands in STATA to check if the null hypothesis that the difference in the means of food security is zero for both these groups,

assuming equal and unequal variances