Economic historians Roger Ransom and Richard Sutch have estimated that African-American farmers in the U.S. South after the Civil War worked about 30 percent fewer hours per year than they had as slaves before the Civil War. If after the Civil War, African-American farmers had continued to work these additional hours, their production and income would have been higher and so would have been U.S. GDP. Would the farmers' well-being also have been higher as a result of working these additional hours? Does your answer affect how we should interpret changes in U.S. GDP from before the Civil War to after the Civil War? Briefly explain.