Optimal fiscal policy requires that tax rates be smooth over time, responding only to permanent changes in government spending.
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。
You don't learn to walk by following rules. You learn by doing, and by falling over.
Leadership is about inspiring people to do things they never thought they could do.
Consciousness is a process, not a substance.