A recent newspaper report claims that even though, over the last five years or so, the price of a box of cigarettes has gone up by around 100%, smoking rates amongst teenagers has increased by around 20%. The report claims that this is a violation of tha law of demand since an increase in price is accompanied by an increase in quantity demanded.Why the phenomenon described here does not necessarily imply a violation of the law of the damand?大家能说一下吗？香烟价格上涨，但是抽烟的青少年比例反而上升．原因是什么？