An economist is someone who, when he finds something which works in practice, wonders if it will work in theory.

An economist is someone who, when he finds something which works in practice, wonders if it will work in theory.

经济学家是这样的人，当他发现在实践中行得通的东西时，他会怀疑它在理论上是否行得通。

-- Walter Heller 沃尔特·海勒