Box plots of economic infrastructure access inequalities in countries in the Global North (N) and Global South (S). The box plots display the distribution of the data, with the median (50th percentile) at the centre, the interquartile range (25th to 75th percentiles) as the box, and whiskers extending to the maximum and minimum values within 1.5 times the interquartile range. The sample sizes were 54 countries for the Global North and 112 countries for the Global South. No replicates were carried out, and no adjustments for multiple comparisons were applied. Statistical significance was determined using a two-sided t -test for comparisons between the Global North and Global South (economic: t 164 = -6.23; P < 0.001; Cohen’s d = -1.05; 95% CI, (-0.15, -0.08)).
