"about 60/215.5 = 28% of founders are immigrants" while "immigrants make up about 13% of the US population".
As I recall, some of the companies were started in the US to get access to US-based funding, that is, the founders were all from another country, moved to the US for the company, but are not immigrants in the sense of staying here for the long term.
If my memory is right, this would skew the numbers higher.
Ahh, here it is: https://news.ycombinator.com/item?id=11310031
"about 60/215.5 = 28% of founders are immigrants" while "immigrants make up about 13% of the US population".
As I recall, some of the companies were started in the US to get access to US-based funding, that is, the founders were all from another country, moved to the US for the company, but are not immigrants in the sense of staying here for the long term.
If my memory is right, this would skew the numbers higher.