81% of American parents believe that spanking is sometimes necessary. That is more than in many other rich countries, 20 of which have banned spanking even by parents. Overall, Republicans spank more than Democrats; southerners more than north-easterners; blacks more than whites; and born-again Christians more than everyone else. Yet numerous studies show children who are regularly spanked become more aggressive themselves, and are more likely to be depressed or take drugs.
The Economist (Nov 12th 2014)