Some new research seeking to understand bullying, including how it develops, its consequences, and how to curtail it:
A look at four decades of research on school bullying:
http://psycnet.apa.org/journals/amp/70/4/293/
Long term consequences of peer victimization in childhood and adolescence:
http://psycnet.apa.org/journals/amp/70/4/300/
Trying to understand how bullying develops:
http://psycnet.apa.org/journals/amp/70/4/311/
On attempts to prevent bullying:
http://psycnet.apa.org/journals/amp/70/4/322/
On attempts by the legal system to deal with bullying:
http://psycnet.apa.org/journals/amp/70/4/333/
On the psychology of bullying, and understanding bullying in a larger context:
http://psycnet.apa.org/journals/amp/70/4/344/