Consider the following scenario: A company’s entry-level workforce is approximately half women and half men, but the proportion of women drops slightly at every level. Only about 38% of managers are women, then 33% of directors, 28% of senior vice presidents, and 21% of C-suite executives. A deeper dive into the data reveals that the drop-off of women is primarily driven by gender disparities in promotion rates, not gender differences in hiring or retention.