pas on vote buying, linear vote buying is bad according to the same theory that predicts QV is good. The only equilibrium under linear vote buying is that the single most intense (or wealthiest) individual has her way at everyone else's expense. This intuition seems to underly much of the discussion here, but only applies when vote buying is linear. The logic, as cwp pointed out, is Tullock's. So while QV is much better than 1-person-1-vote, linear vote buying is worse than either.