Final answer:
Clark L. Wilson's research suggests that about 50-70% of managers are ineffective due to imbalanced managerial skills, indicating a need for well-rounded leadership capabilities.
Step-by-step explanation:
According to the research conducted by Clark L. Wilson, approximately 50-70% of managers at all levels are considered ineffective due to imbalanced managerial skills. This finding highlights the significant impact that managerial skills can have on the effectiveness of leadership within organizations. Managers may be strong in some areas, such as technical knowledge or task execution, but may lack the necessary interpersonal or strategic thinking skills that are critical for successful management.