It’s well-known among people who bother to learn the facts that U.S. manufacturing output continues to rise despite the reality that the number of Americans employed in jobs classified as being in the manufacturing sector peaked in June 1977 and has fallen, with very few interruptions, ever since. Nevertheless, some people – for example, the Economic Policy Institute’s Robert Scott – continue to insist that the loss of manufacturing jobs in the U.S. is largely due to increased American trade with non-Americans. Other studies find empirical evidence that labor-saving innovation rather than...