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"if your firm invests in more machines so that less hand labor per loaf is required, output (value added) per hour should go up. But multifactor productivity will not necessarily rise, because your combined input measure will rise by about the same amount as output. There is another potential source, however, of increases in output per hour. If you discover a way to rearrange your labor force and equipment so that production is more efficient, or discover a great new recipe for a loaf that is equally tasty but costs you less to bake, multifactor productivity in your firm may go up, increasing your output (value added) per hour even in the absence of any capital deepening."
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