A key driver of foreign investment in land, food security is a challenge mankind has been confronted with in various times and places. Wherever human societies have developed, growing needs have led to increasing arable land, and when land has been limited by nature or wars, food shortages...

Household surveys from 13 developing countries are used to describe consumption choices, health and education investments, employment patterns and other features of the of the economic lives of the “middle classes†defined as those whose daily consumption per capita is between $2 and...