关于美国经济为何强劲，商业文明是其底层核心
文中罗列的因素有：
An entrepreneurial culture. 企业家文化（或者说创业文化？）
A financial system that supports entrepreneurship. 能够支持创业文化的经济系统
World-class research universities. 世界级别的研究型大学
Labor markets that generally link workers and jobs unimpeded by large trade unions, state-owned enterprises, or excessively restrictive labor regulations. 活跃的劳动力市场
A growing population, including from immigration. 人口增长，移民通道
A culture (and a tax system) that encourages hard work and long hours. 鼓励勤劳工作的文化
A supply of energy that makes North America energy independent. 能源供应充足
A favorable regulatory environment. 对商业容忍性高的管制环境
A smaller size of government than in other industrial countries. 小ZF管理
A decentralized political system in which states compete. 分散的ZZ体系，各州可以竞争