If everyone saved more, wed have a problem. Robert ShillerLast week, in promoting a new edition of Irrational Exuberance, Robert Shiller, a Nobel Prize-winning economist from Yale University, said he is encouraging his students to save more, because the golden age of investing is over and investors will need to save more to have enough for retirement.Then, in an interview with Yahoo Finance, he nodded his head with approval when the interviewer said that saving more would ruin the economy. Shiller added, If everybody saved more, then wed have a problem. The interviewer went on to say, Shiller is...