[godelski]

This is a great point, but at the same time how do we answer this question when all our experiments last 5 years or less? To answer this question you have to run an experiment for roughly 30 years, ensuring that people born into this system are taken through college (i.e. the dependent years, which is usually considered <25yrs of age) and that you have enough children being born during this period. We know that influences before the age of 8 have significant factors in establishing things like educational culture for children, and this is highly associated with socioeconomic status.

So if we're saying that an experiment has to run for at least 30 years: 1) why aren't we getting on that? 2) are short term studies enough to warrant bypassing the long term small scale study and precede to a large scale study?