というFT論説をサマーズが書いている(原題は「No free lunches but plenty of cheap ones」;H/T Economist’s View)。

Trade-offs have long been at the center of economics. The aphorism “there is no such thing as a free lunch” captures a central economic idea: You cannot get something for nothing....

Yet I am increasingly convinced that “no free lunch” oversimplifies matters and makes economics too dismal a science. It would be true in a world where all opportunities to make things better had been fully exploited — where, to use another cliché, there were no $100 bills lying on the street. But recent experience suggests that by improving incentives or making strategic investments, we can achieve apparently conflicting objectives to a greater extent than conventional wisdom would suggest.


Trade-offs should be seen not as constraints but challenges. There are plenty of very cheap lunches out there for those with the will to find them. Economics has much to contribute and much to gain from this search as well. It can become a cheerful science.







  • コストと質
  • 公平と効率性
    • 反トラスト法を通じたレントシーキングの抑止による公平と効率性の両立
    • 教育機会の増加による公平と効率性の両立
    • 金融規制の合理的な強化による金融危機の抑止を通じた、消費者にとっての公平と、経済パフォーマンスという効率性の両立
    • 需要不足経済において税制の累進性を強めることによって達成される公平性と、支出増加ならびに資源の有効活用との両立
  • 公的政策以外
トラックバック - http://d.hatena.ne.jp/himaginary/20160216/no_free_lunches_but_plenty_of_cheap_ones