The true test of a mathematical idea is its ability to inspire further thought.
最优财政政策的设计应旨在减轻时间不一致性和政治经济周期引起的扭曲。
Ignorance more frequently begets confidence than does knowledge.
伟大的公司不只是销售产品;它们解决问题。
Happiness in this world, when it comes, comes incidentally. Make it the objet of pursuit, and it leads us a wild-goose chase, and is never attained. Follow some other object, and very possibly we may find that we have cought happiness without dreaming of it.