If you took all the senior schools throughout the UK between the 50s to the abolition of CP, the percentage of pupils that received CP would be considerably less than those that didn’t.
Of those same schools CP would have been administered on an inconsistent basis of misdemeanour. HB is right that in the UK we have no parallel comparison of the effect or contribution CP had over behaviour.
Last week a corner shop in London, a boy 11 thereabouts, walked in dressed in short trousers blazer tie, and a cap for all purposes he looked like a child plucked from a past generation, his uniform for the end of the school year was immaculate his manners exemplary, the same day a group of four girls on a bus dressed very traditionally summer dress, boaters, very polite, well mannered, one of them gave up her seat for a more senior person. These children were from the private education sector. So what makes them so different in behavior to their state counterparts?