How did American industry boost its overall efficiency during the 1920s?

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During the 1920s, American industry increased its efficiency primarily through the introduction of automatic machinery, which allowed for the use of unskilled and semiskilled workers in mass production processes. This period saw significant advancements in manufacturing techniques, notably the expansion of the assembly line method, which streamlined production and reduced costs.

How Did American Industry Boost Its Overall Efficiency During the 1920s