Abstract
This meta-analysis reviews 203 peer-reviewed studies (from 2019–2024), selected from an initial pool of over 800, to assess how board diversity affects corporate financial performance, excluding studies mixing in ESG or CSR factors. Diversity is broadly defined, including gender, education, race/ethnicity, nationality, culture, and age.
Key findings:
- About 73% of the studies find a positive relationship between board diversity and performance. Among those, roughly 57% report a direct positive effect (e.g. higher return on assets or equity), and 16% report indirect benefits, like improved governance, risk management or strategic decision-making.
- Gender diversity is the most frequently studied facet (present in 85%+ of studies) and is often associated with better oversight, accountability, stakeholder alignment, and long-term corporate performance.
- A minority of studies (≈16%) find no significant effect; a very small subset (≈5%) find negative associations, typically in contexts where diversity is more symbolic (tokenism), poorly integrated, or implemented without accompanying structural support.
The review concludes that board diversity can have a meaningful financial upside, but benefits tend to materialize when diversity is substantive, supported by strong governance, and aligned with firm culture and strategy.
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