That ' s pretty impressive . I can usually only do this gs that are physically possible . <| sep |> I know your pain all too well . These things are clearly not obvious to most players . <| sep |> At a glance the paper seems to suggest the exact opposite of your view , i . e . results show that while the prevalence of privately managed schools in a country is not related to stratification , the level of public funding to privately managed schools is . in sweden , finland , the netherlands , the slovak republic and the partner economy hong Kongchina , principals in privately managed schools reported that over 90 % of school funding comes from the governmenand In those countries where privately managed schools receive higher proportions of public funding , there is less stratification between publicly and privately managed schoolsand then crucially , pISa results also show that those countries that have low levels of socioeconomic stratification also tend to have better overall performanceI haven ' t gone any deeper into the paper so you can point out if I got this backwards but does this not essentially say higher public spending on private schools lowers stratification and thus raises overall performance at least on a correlation level ? Whats also interesting in my opinion is but in other countries , school fees do not explain stratification completely . other school characteristics , such as a school ' s studentadmittance criteria , academic performance , policies , practices and learning environment are also partly related to stratification . so as I understand it there is also ' merit ' based stratification which I find hard to argue against since I personally befitted a lot from something that would probably be considered that . Edit Ok , so looking a bit further , even the correlation between performance and socioeconomic stratification seems kind of far fetched . If you look at their data for that claim Figure 2 . 2 on page 27 , it really seems like instead of some causeeffect relation between performance and socioeconomic stratification there is a difference between first and third world nations where if you only take first world nations , there seems to be little to no correlation between performance and socioeconomic stratification and the same if you take third world nations . The correlation then comes from the fact that first world nations on average have higher performance and a lower level of variance in stratification biased towards the lower end . I don ' t have the data set so I can ' t be 100 % sure , but like I said , just looking at the graphed data it seems kind of clear .