Extended Data Fig. 4: Sensitivity of estimated differences in slope coefficients used to classify states.
From: The contribution of wildfire to PM2.5 trends in the USA

Left column shows differences in early (β1) and recent period (β2) estimates of changes in total PM2.5, and the confidence interval on estimated differences, that are used to classify states into stagnating/reversing categories. Middle column shows differences in recent period total PM2.5 (β2) and non-smoke PM2.5 (\({\beta }_{2}^{{\prime} }\)) slopes that are used to classify states as smoke-influenced. Right column shows same, but for recent period changes in extreme days. Colors match sample as denoted in the legend at right.