I asked an economist for her phone number....and she gave me an estimate.       我问一个女经济学家电话号码……，她给了我一个估计值。

    Economists have forecasted 9 out of the last 5 recessions.
    经济学家已经预测到了最近5次（经济）衰退中的9次。

   An economist is someone who doesn't know what he's talking about - and make you feel it's your fault.  
   经济学家就是那些不知道自己在说什么但是能让你觉得自己错了的人

   http://netec.mcc.ac.uk/jokec.html