Figure 2. Regression results for the association between ethnoracial concentration and cooling degree days (CDDs). Solid black lines indicate partial effects from a natural cubic spline with three knots, and dashed lines indicate 95% confidence intervals. All models are adjusted with fixed effects for county and year as well as a tensor product smooth of the latitude and longitude of the census tract’s population-weighted centroid by year. Binned hexagons of partial residuals are depicted as light blue (low values) to charcoal (high values).