… is from page 60 of economists Phil Gramm’s, Robert Ekelund’s, and John Early’s important 2022 book, The Myth of American Inequality: How Government Biases Policy Debate:
American manufacturers responded to the mounting competition [starting in the 1970s from imports] with increased automation and the application of more efficient production methods aimed at reducing cost, increasing efficiency, and improving quality. As a result of these improvements in methods and concentration on high-end, capital-intensive production, real U.S. manufacturing output continued to grow from 1979 until the 2008 recession, when it fell sharply; it has not, as of this writing, fully recovered.