It's even hinted at in the article: "A significant connection between the parents’ level of education and entrepreneurship was also noted." The clickbait title confirming people's priors isn't surprising though.
If I had to guess at the causal graph it would something like:
smart -> income
smart -> entrepreneurship
entrepreneurship -> income
income -> entrepreneurship
And even without the last two connections the smart confounding variable would induce a relationship between income and entrepreneurship.
If I had to guess at the causal graph it would something like:
smart -> income smart -> entrepreneurship entrepreneurship -> income income -> entrepreneurship
And even without the last two connections the smart confounding variable would induce a relationship between income and entrepreneurship.