Over a five-year period in a developing economy, the share of total national income received by the poorest 20% of households rose from 4% to 7%, while the share received by the richest 20% fell from 48% to 43%. Over this same period, real GDP increased by 15% and the total population (as well as the number of households) remained constant.
Which of the following statements must be correct?
The absolute real income received by the richest 20% of households decreased.
The Gini coefficient for this economy must have increased.
The absolute real income received by the poorest 20% of households more than doubled.
The share of national income received by the middle 60% of households decreased.
