WHO INVENTED ROI?

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One of the pioneers in formalizing and promoting the use of ROI as a metric was Donaldson Brown, an engineer and executive at DuPont, who in 1914 integrated ROI into a financial model that was later adopted by General Motors. The first markets to implement ROI were industrial and manufacturing, where quantitative methods were needed to evaluate the efficient use of capital invested in machinery, factories, and operations. The concept later expanded to banking, stock market investment, and, much later, to the stock market.