Well, if done with abandon, it doesn't work. Also, negative reinforcement doesn't work as well as positive reinforcement. While I am sure that there are times when a spanking is in order, it is not something that I could actually do. I find it hard to shout at my doggie and, to be honest, he's a wee angel.
Unless your kids has behavioural problems, good communication should iron out issues. If there are behavioural problems, then psychologists should address these.
As for CANING in schools, I'm all for that. It is outwith the home and the children that assault the other children and disrupt classes can do so with abandon.
So, I believe in bringing back the cane and the legalisation of spanking - but I will concede that spanking is inefficient and it is not something that I would personally partake in.