Table 2.

Kolm–Pollak inequality index of summer daytime surface urban heat island intensity (SUHI) by climate zone and sociodemographic group.

	Climate zone
	Arid	Snow	Temperate	Equatorial	Total
(a) Population-weighted index means: Total	0.12	0.29	0.27	0.20	0.26
	(0.09)	(0.11)	(0.12)	(0.03)	(0.13)
By race/ethnicitya: People of color	0.10	0.24	0.23	0.19	0.22
	(0.07)	(0.08)	(0.12)	(0.02)	(0.11)
Hispanic	0.09	0.25	0.21	0.20	0.19
	(0.06)	(0.08)	(0.11)	(0.02)	(0.11)
Non-Hispanic Black	0.09	0.19	0.22	0.15	0.21
	(0.05)	(0.07)	(0.08)	(0.01)	(0.08)
Non-Hispanic White	0.14	0.27	0.27	0.18	0.26
	(0.12)	(0.11)	(0.12)	(0.04)	(0.12)
Non-Hispanic Other	0.13	0.25	0.27	0.20	0.26
	(0.08)	(0.11)	(0.17)	(0.03)	(0.16)
By income: Below poverty	0.10	0.25	0.24	0.17	0.23
	(0.08)	(0.10)	(0.11)	(0.02)	(0.11)
1–2 × poverty	0.10	0.26	0.24	0.17	0.22
	(0.08)	(0.11)	(0.11)	(0.02)	(0.11)
Above 2 × poverty	0.13	0.28	0.27	0.21	0.26
	(0.10)	(0.11)	(0.13)	(0.04)	(0.13)
(b) Difference in mean index values: People of color − Non-Hispanic white	−0.04	−0.04	−0.04	0.01	−0.04*
	(0.055)	(0.031)	(0.030)	(0.018)	(0.023)
Below poverty − 2 × poverty	−0.03	−0.02	−0.03	−0.04	−0.03
	(0.048)	(0.032)	(0.029)	(0.014)	(0.023)
People of color − below poverty	0.00	−0.02	−0.01	0.02*	−0.01
	(0.038)	(0.027)	(0.026)	(0.007)	(0.020)

Source: Author calculations, based on data from US Census Bureau and²⁴. Panel (a): Population-weighted mean of urban area Kolm–Pollak indexes in °C with moderate inequality aversion. Standard deviation is given in parentheses. Panel (b): Difference in group means. Robust standard errors are given in parentheses.

*p < 0.10.

^aHispanic is defined as all who report “Hispanic, Latino, or Spanish origin” as their ethnicity, regardless of race. People of color includes all Hispanic and all who do not identify as white alone. Black and white include all non-Hispanics identifying as these races alone. Other includes all other non-Hispanic races alone and more than one race.