跳楼 is one of the common methods to suicide,as for the university students you mentioned,we usually ascribe it to the pressure,you know the world give them too much pressure far beyond they can hold,now,as the economic recession still goes on,there will be more university student who face too much pressure,well most of them will not go that way,but some students may feel despaired about this ,so they choose to suicide.I want suicide too,but I'm afraid of the potential ...I even admire the people who have the courage to suicide ,lol that's what I think.