Increased Diversity Doesn’t Always Improve Performance
Despite assertions that workforce diversity makes an organization better, research says otherwise. A survey of the top research on the connection between diversity and performance over the past decade reveals few reliable studies that show a direct relationship between greater workforce diversity and increased bottom-line performance. Complicated links are much more common. For example, racial diversity neither improves nor diminishes performance in financial services firms, with two exceptions: if the firm is in a strategic growth mode, racial diversity helps. But if it is in a downsizing phase, diversity decreases performance.
In one of the more comprehensive evaluations of the link between diversity and performance, Thomas Kochan and his colleagues examined the impact of race and gender diversity on performance in two information-processing firms, a financial services firm, and a retail company. Across these varied organizations they found little evidence of any direct relationships between increased race and gender diversity in the workforce and higher returns on investment, profits, revenue, costs, or other financial measures.
Indeed, in a large study of fast-food establishments, an even bleaker picture emerged. Joshua Sacco and Neal Schmitt studied the effect of race, age, and gender diversity on the financial performance of more than 3,400 quick-service restaurants. They had hypothesized that diversity would hinder financial performance, reasoning that the disruptions that frequently occur within diverse teams would have a kind of domino effect that would adversely affect financial performance. While their study didn’t show that gender or age diversity had any bearing on financial performance, increased racial diversity among employees was correlated with lower levels of profitability.
These results are stark and challenging. It is worth noting, however, that some types of diversity can make a positive difference. Specifically, having people with diverse functional backgrounds or tenures on top management teams can positively affect the return on assets. Similarly, racial diversity on boards of directors can increase the return on investment. And managerial diversity may enhance performance for some firms in the long run, if not immediately. These results suggest that increasing diversity could affect organizational performance in positive ways. The inquiry must continue. But the unqualified assertion that any kind of diversity will lead to superior performance is just wrong.