(a) Correlation matrix of the explanatory variables (minimum comparable areas, MCAs). (b) Correlation matrix of the explanatory variables (micro-regions). (c) Correlation matrix of the explanatory variables (meso-regions). (d) Correlation matrix of the explanatory variables (states).
(a)
Explanatory variables
1
2
3
4
5
1
ln (income per capita)
1
0.18
0.68
0.22
−0.69
2
()
0.18
1
0.08
0.07
−0.05
3
ln (average years of schooling)
0.68
0.08
1
0.21
−0.54
4
ln (population density)
0.22
0.07
0.21
1
−0.30
5
ln (transportation cost to SP)
−0.69
−0.05
−0.54
−0.30
1
Note: own elaboration. Number of observations = 10,971.
(b)
Explanatory variables
1
2
3
4
5
1
ln (income per capita)
1
0.16
0.85
0.26
−0.67
2
()
0.16
1
0.06
−0.21
0.07
3
ln (average years of schooling)
0.85
0.06
1
0.34
−0.63
4
ln (population density)
0.26
−0.21
0.34
1
−0.47
5
ln (transportation cost to SP)
−0.67
0.07
−0.63
−0.47
1
Note: own elaboration. Number of observations = 1,566.
(c)
Explanatory variables
1
2
3
4
5
1
ln (income per capita)
1
0.13
0.87
0.29
−0.62
2
()
0.13
1
0.02
−0.37
0.24
3
ln (average years of schooling)
0.87
0.02
1
0.38
−0.59
4
ln (population density)
0.29
−0.37
0.38
1
−0.54
5
ln (transportation cost to SP)
−0.62
0.24
−0.59
−0.54
1
Note: own elaboration. Number of observations = 402.
(d)
Explanatory variables
1
2
3
4
5
1
ln (income per capita)
1
0.03
0.88
0.21
−0.55
2
()
0.03
1
−0.10
−0.60
0.44
3
ln (average years of schooling)
0.88
−0.10
1
0.27
−0.52
4
ln (population density)
0.21
−0.60
0.27
1
−0.69
5
ln (transportation cost to SP)
−0.55
0.44
−0.52
−0.69
1
Note: own elaboration. Number of observations = 81.
