Two Views of Capital Hours -- Continuous Process, Data, and a Research Agenda -- The Utilization of Capital Equipment: Postwar Compared with Prewar -- Changes in the Plant Workweek from 1929 to 1976 and Their Relation to Key Ratios -- Reasons for Changes in Average Weekly Plant Hours from 1929 to 1976 -- Estimating Average Weekly Plant Hours in Manufacturing for the Period between 1929 and 1976 -- Evaluating the Manufacturing Results for Interim Years -- Nonmanufacturing Industries -- Office Equipment and Computers -- Operating Hours of U.S. Manufacturing Plants, 1976-1988, and Their Significance for Productivity Change