I believe I understand the question & goal, and maybe this is the right way to go about it, but I’m not sure. It somewhat strikes me as the wrong question -- people don’t choose college equally at all income & IQ levels, and some of the factors that (statistically) lead people into to choosing to go are already accumulating before they’re even born. As a result, the hypothetical solution that hides the factors that lead to that choice in the first place in the data might not be fairly or adequately answering the question of whether someone should invest in college, given the choice, right?

Under this model, you could have someone with a higher IQ and a degree earning more money than a non-degree holder, but have a ‘negative’ return. Does that accurately reflect the situation, should the advice be to skip college, even though the absolute financial returns might be positive?

And what does this answer tell someone who has a low IQ or a low socioeconomic status? How should they try to evaluate this choice? Does discounting high IQ and high family education give an accurate picture of the benefits of post-secondary education to poorer families?