Aside from all the other points, I'm curious to see further longitudinal data on the comparative success of these students once they enter college compared to t

Aside from all the other points, I'm curious to see further longitudinal data on the comparative success of these students once they enter college compared to their peers at college. Further, it'd be interesting to see their eventual success against those who went to the coed schools. It'd also be interesting to run a self-assessment of the single-sex students vs the coed students asking them a broad array of well-being questions, e.g. their happiness, level of fulfillment and satisfaction in life, etc. Interesting starting point, but like pointed out flawed to say single-sex schools are better overall purely based on this one metric. The only thing that can be said here is that single-sex schools drive greater admission to colleges than coed schools in Seoul, given the way these schools are administered there. Things that definitely need to be addressed - what are the differences in the coed vs single-sex schools these people go to? Are the single-sex schools taught differently at all? And if so, how? Why does Seoul have a single-sex vs coed separation in the first place?