This is a short lecture on economics, better than anything I got in grad school. Brad http://www.youtube.com/watch?v=VVp8UGjECt4&eurl=http%3A%2F%2Fgregmankiw%2Eblogspot%2Ecom%2F2007%2F02%2Ften%2Dprinciples%2Dof%2Deconomics%2Ehtml