国民体系，又称也被称为美国学派是在政治，政策和哲学上相关的经济理论。在宏观经济学看来，美国学派主导了自美国内战到20世纪中叶美国的经济政策，直到凯恩斯主义的出现。其主要观点是:

See also American System (economic plan).

The American School, also known as the "National System", represents three different yet related constructs in politics, policy and philosophy. It was the American policy from the 1860s to the 1970s, waxing and waning in actual degrees and details of implementation. Historian Michael Lind describes it as a coherent applied economic philosophy with logical and conceptual relationships with other economic ideas.