The Declining Productivity of Education

[roethlisburger]

How could it be possible any logical causality exists from high college education costs (later in the time line) to k-12 education outcomes (earlier in the time line)?

I agree there’s a logical fallacy here, but I think the author could have made the productivity argument just about k-12 education. Real per pupil k-12 spending has gone up quite a lot over the past 30 years. The productivity of the marginal spending seems low when measuring changes in 12th grade NAEP outcomes.