> There are numerous studies showing that diverse teams come up with better solutions.
There are also numerous studies that show diversity has either no effect or even negative effects on various measures of group performance - the academic literature on this issue is a total mixed bag. Here's how the OECD's [1] summary of the literature on diversity and firm performance:
> "Contrary to the often assumed, direct positive impact of diversity on business performance, research shows that at the firm level, the business case for diversity is not particularly strong. However, while the impact of diversity might be small, there is a strong economic argument against discrimination and non-inclusion based on the sizeable cost associated with it. Finally, the chapter notes ethical reasons for fostering a just and equitable labour market alongside the economic argument for diversity."
The literature also suggests the effects of diversity on group performance, whether positive, neutral or negative, are situation specific, depend on your measure of 'performance', and your definition of 'diversity'. Again, from the OECD:
> "A number of studies make a difference between ‘highly job-related diversity’, such as educational background, job position or function in the company, and diversity aspects that are ‘less job-related’, e.g. gender, ethnicity or age. Measurement of team performance includes multiple indicators, such as efficiency, creativity, innovation and productivity. Findings are somewhat mixed, but impacts of gender, ethnicity or age diversity are found to be either very small or insignificant. Some meta-analyses find no significant impact of gender composition, ethnicity or age on team performance (Horwitz and Horwitz, 2007[19]; Schneid et al., 2016[20]), while others find negative, but very small impacts (Bell et al., 2011[21]; Joshi and Roh, 2009[22])3. Most studies do, however, find a positive relationship between team performance and having teams with different professional backgrounds and other task-related characteristics (Bell et al., 2011[21]; Horwitz and Horwitz, 2007[23]; Joshi and Roh, 2009[22]). Overall, these findings from meta-analyses seem to suggest that team diversity in terms of gender, ethnicity or age do not matter much for team performance. However, there is some evidence that demonstrates the importance of situational settings by examining under what specific conditions diversity dynamics may unfold and how."
[1] https://www.oecd-ilibrary.org/sites/5f8c1531-en/index.html?i...