Some friends have been commenting on a nature-vs-nurture paper concerning adoption. I haven’t read through the whole paper but I found a snippet that strongly implies the chart draws from incomplete data and is completely irrelevant.
Here is the paper for your perusal and comments.
Here is the graph
and here is the snippet from page 14 calling this graph into question.
The survey measure of family income is much higher for the non-adoptees than for the adoptees: $61,000 per year versus $42,000 per year. But this huge difference narrows to $1,600 when I control for age, education, and gender.
I don’t know the origin of the graph for sure but it appears to be from marginalrevolution.com.