This chapter presents the overall results of the regression analysis conducted across 71 major US corporations from 1950 to 2024. The analysis used the reduced-form regression model (Eq. 1.2) to estimate the slope coefficient λ1, which reflects the long-run operating profit markup before depreciation and amortization. The data cover 11 distinct industries, including petroleum, manufacturing, pharmaceuticals, chemicals, computing, defense contracting, and services.