This is a comment on:
Within all ethnic groups, wealthier parents were more likely to have autistic children, and the pattern held for undiagnosed autistic children as well.
The original paper commented on is at:
The title says it all: "Socioeconomic Inequality in the Prevalence of Autism Spectrum Disorder: Evidence from a U.S. Cross-Sectional Study"
I have no idea if this represents the ability of parents to obtain screening, the general age of wealthier parents, or some other factor(s). Also, as this is from PLoS, not a traditional peer-reviewed journal, I'm sure there will be some discussion of the research methods. However, we are seeing that PLoS submissions are improving dramatically -- many researchers are simply avoiding the expensive, proprietary journal process.