There is not an specific age for bullying to occur, some people start at early age like ten, fifteen and in some cases it can occur in adults. Bullying happens in different places like, school, work, internet and many other places. Is more frequent for bullying to occur during adolescent age (11-18) because they are adapting to different social events that can confuse and frustrate witch can turn to a negative response. This negative response to society can turn to an aggressive behavior.
http://onlinelibrary.wiley.com/doi/10.1002/ab.1027/abstract?systemMessage=Wiley+Online+Library+will+be+disrupted+17+March+from+10-14+GMT+%2806-10+EDT%29+for+essential+maintenance
