So..regardless of if this is true or not, have there been any studies that suggest banning books actually creates more readers? If so, why aren't schools doing

So..regardless of if this is true or not, have there been any studies that suggest banning books actually creates more readers? If so, why aren't schools doing this on purpose and looking the other way when the "bans" get "violated" by methods like this? Can they ban math books and get a similar effect?