There is evidence that a good manager increases the productivity of its staff by about 10%, according to a study published by the National Bureau of Economic Research in the United States.
The study, conducted in a information technology services corporation, allowed three conclusions: (1) the choice of the manager is crucial, because it directly impacts staff productivity by about 10%, (2) the most important function of a manager is to teach his team, and (3) allocating the best chefs with the best staff generates a higher increase in productivity than allocating the worst.
Link to download the original study: team_management_study
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