最优财政政策要求税率随时间平稳变化，仅对政府支出的永久性变化作出反应。

The first duty of the sovereign， that of protecting the society from the violence and invasion of other independent societies， can be performed only by means of a military force.

应对不自由世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。