This is great data. I think the figures, particularly fig 3, tell the clearest story here. Wage percentile is monotonic in cognitive ability between the 10th

This is great data. I think the figures, particularly fig 3, tell the clearest story here. Wage percentile is monotonic in cognitive ability between the 10th and 95th percentile of income. You could imagine that in the top percentiles other factors start to dominate; e.g maybe the likelihood of someone being both top 5pct in cognition and contentiousness is low, and the latter starts to be weighted more heavily at the extremes.