Final answer:
The assertion that general managers now work a traditional 40-hour workweek is false. Current research and historical data indicate that both historically and recently, many workers, including general managers, tend to work more than 40 hours a week.
Step-by-step explanation:
The statement that since the 1960s research conducted by Mintzberg, the typical general manager has reduced her work week to the traditional 40 hours is false. Historical data indicates that while the average workweek declined to just over forty hours in some fields as a goal of the labor movement, the typical workweek for industrial workers remained around six days of 48 hours of labor. Moreover, recent findings demonstrate that in the United States, people still work an average of 42-54 hours per week, according to the Bureau of Labor Statistics—U.S. Department of Labor, 2019. Additionally, Table 1 data from the Bureau of Labor Statistics suggests that U.S. workers averaged 38.5 hours per week in 2013, but for full-time workers, the average was 42.5 hours per week.