Table 3. Income and Education Indicators for Brazilian Municipalities.

Indicator	Description	Category	Range of values
MHDI income	Represented by the variable mhdi_income, it corresponds to the component “income” of the MHDI. It is measured by the municipal income per capita, that is, the average income of residents of a given municipality.	very low	0.000 ≤ MHDI income ≤ 0.499
		low	0.500 ≤ MHDI income ≤ 0.599
		medium	0.600 ≤ MHDI income ≤ 0.699
		high	0.700 ≤ MHDI income ≤ 0.799
		very high	0.800 ≤ MHDI income ≤ 1.000
MHDI education	Represented by the variable mhdi_education, it corresponds to the component “education” of the MHDI. This is based on the geometrical average of the frequency sub-index of children and youngsters in school (weight 2/3) and the education sub-index of the adult population (weight 1/3).	very low	0.000 ≤ MHDI education ≤ 0.499
		low	0.500 ≤ MHDI education ≤ 0.599
		medium	0.600 ≤ MHDI education ≤ 0.699
		high	0.700 ≤ MHDI education ≤ 0.799
		very high	0.800 ≤ MHDI education ≤ 1.000

The values for MHDI Income and MHDI Education are represented by numbers ranging between “0” and “1”; the closer the number is to “1,” the higher is the component (income or education) of human development of a municipality. These value ranges are defined and categorized by the Institute for Applied Economic Research (Instituto de Pesquisa Econômica Aplicada) [31].