In short, what does the research show?
Research on diversity and performance is extensive and spans both academic studies and analyses from consulting firms and financial institutions. Although results vary, several larger analyses point in the same direction.
Several international studies find a statistical correlation between diversity in leadership and companies’ financial performance, innovation capacity, and the quality of strategic decision-making. McKinsey, Credit Suisse, and Boston Consulting Group have, for example, documented that companies with greater diversity in leadership teams often perform better on key metrics.
At the same time, research emphasises that diversity does not automatically create better results. The effect depends to a large extent on the organisation’s culture, leadership style, and decision-making processes. Diversity works best when combined with inclusive leadership, psychological safety, and clear governance structures.
For boards and executive teams, this means that diversity should not be viewed as an isolated goal, but as part of a broader strategy for leadership, talent development, and organisational design.
The relationship between diversity and companies’ performance has in recent years moved high up the agenda in boards and executive teams. As the topic has gained greater importance in ESG assessments, corporate governance, and investors’ analyses, the question has become increasingly relevant: Does diversity in leadership actually have a measurable impact on company performance?
The research does not provide one clear answer, but overall it points in a clear direction. A number of international analyses find statistical correlations between diversity in leadership and factors such as financial performance, innovation, risk management, and the quality of strategic decision-making. At the same time, research emphasises that diversity in itself is not a guarantee of better results. The effect depends to a large extent on how organisations work with leadership, culture, and governance.
This article reviews what the research actually shows – and what boards and executive teams can take from it in practice. At the same time, the discussion is closely linked to companies’ broader work with diversity in recruitment and talent development, where the composition of leadership teams and boards plays a central role.
Diversity in leadership: why has it become a strategic leadership topic?
Diversity in leadership was previously primarily viewed as an HR topic or a question of equality. Today, it has increasingly become a strategic issue for organisations seeking to strengthen their competitiveness and governance.
The development is driven by several parallel trends. First, a number of international analyses have helped highlight the potential relationship between diversity and company performance. McKinsey’s first report Why Diversity Matters from 2015, for example, showed that companies in the top quartile for gender diversity in leadership were 15% more likely to outperform financially. Later analyses – including Diversity Wins (2020) and Diversity Matters Even More (2023) – have expanded the dataset to more than 1,200 companies globally and found a continued statistical correlation.
Second, the ESG agenda has shifted diversity from a values-based discussion to a question of governance and risk management. Investors, banks, and regulators increasingly demand data on diversity within organisations as an indicator of long-term sustainability and responsible leadership.
Finally, regulation also plays a role. In 2022, the EU adopted a directive on gender balance in the boards of listed companies, requiring at least 40% of the underrepresented gender among non-executive board members – or 33% of all board positions – by 2026. At the same time, there is increased focus on equal pay and transparency in salary structures through the EU Pay Transparency Directive, which introduces new requirements for companies’ reporting and handling of pay differences.
Overall, this means that diversity today is increasingly viewed as part of organisations’ strategic development, governance, and responsible leadership practices.
Diversity and performance: what does research show?
When reading the research in this area, it is important to understand the difference between correlation and causation. Many studies document statistical relationships between diversity and better results, but this does not necessarily mean that diversity alone creates these results.
Successful companies may, for example, find it easier to attract diverse talent, just as diversity often appears alongside other factors such as strong leadership, good governance, and attractive career opportunities.
Despite this nuance, several large analyses point to a consistent trend.
Key research findings
| Study |
Main finding
|
| McKinsey – Diversity Matters Even More (2023) | Companies in the top quartile for gender diversity in leadership are 39% more likely to outperform financially |
| Credit Suisse – Gender 3000 (2019) | Companies with at least 25% women in senior leadership perform better than companies with lower representation |
| Boston Consulting Group – Diversity & Innovation (2018) | Companies with high diversity generate 45% of revenue from innovation, compared to 26% in companies with low diversity |
Academic meta-studies – including those published in Harvard Business Review and the Academy of Management Journal – generally find positive, but often moderate, effects of diversity on team and organisational performance.
The effect varies significantly depending on industry, type of work, and leadership quality. In some organisations, studies find neutral or mixed results – especially when diversity is not accompanied by an inclusive culture and clear collaboration processes.
Which types of diversity influence company performance?
When discussing diversity in organisations, it is important to distinguish between different types. Research typically distinguishes between demographic diversity – such as gender, age, or nationality – and cognitive diversity, which relates to differences in perspectives, experiences, and ways of solving problems.
Gender diversity is the most studied dimension. Several analyses find correlations between the proportion of women in leadership and factors such as improved risk management, stronger ESG performance, and higher financial performance. At the same time, data from many European countries show that representation still declines significantly the higher one moves up in the organisation.
Professional and functional diversity also plays an important role. Boards and leadership teams with diverse professional backgrounds – such as finance, technology, law, and commercial expertise – often have better conditions for identifying both risks and opportunities in the company’s strategy.
Cultural and international diversity can likewise strengthen organisations’ ability to understand global markets and different customer segments. For companies with international operations, this dimension can be decisive.
Finally, research increasingly highlights cognitive diversity – differences in how people analyse problems and make decisions. Teams with different analytical approaches often perform better in complex situations where there is no single obvious solution.
How can diversity strengthen decision-making in leadership?
Research points to several mechanisms that can explain why diversity in leadership teams and boards can influence the quality of decision-making.
First, different perspectives can lead to a broader analysis of risks and opportunities. Leadership teams with varied backgrounds often ask more questions and challenge established assumptions more than more homogeneous groups.
Second, diversity can reduce the risk of the phenomenon known in leadership literature as groupthink – a situation where groups without sufficient internal disagreement reach agreement quickly without critical discussion. Classic research by Irving Janis shows that homogeneous groups are more likely to accept shared assumptions without challenging them.
Finally, diversity can contribute to increased innovation. When different experiences and perspectives meet, new ideas and alternative solutions often emerge. Studies from Boston Consulting Group and Harvard Business Review point to this mechanism as an important explanation of the link between diversity and innovation output.
Diversity in practice: what does the research mean for boards and executive teams?
For boards and executive teams, the research primarily means that diversity should be viewed as part of the organisation’s strategic leadership work.
It is not only about representation, but about the composition of competencies, perspectives, and experiences in leadership. Many organisations therefore work more systematically with the composition of boards and leadership teams as well as the development of talent pipelines for future leadership roles.
When diversity is integrated into these processes – for example through structured recruitment processes, leadership development, and an inclusive organisational culture – the likelihood increases that the organisation will actually benefit from diverse perspectives.
An important part of this work is also reducing unconscious bias in recruitment processes, which can influence the evaluation of candidates and limit the organisation’s access to talent.
Diversity as part of the future of leadership
Research does not provide a single answer to the question of diversity and performance. However, it points to a clear trend: organisations that work systematically with diversity in leadership are often better equipped to navigate complex and rapidly changing markets.
Diversity can strengthen the quality of strategic decisions, increase organisations’ capacity for innovation, and improve understanding of customers and markets. At the same time, it can contribute to attracting and developing talent in a time where competition for qualified employees is intense.
For boards and executive teams, working with diversity is therefore increasingly about long-term competitiveness. The key question is no longer whether diversity matters – but how organisations best translate research into practice within their own organisation.
