When researchers at the University of Gothenburg set out to measure something most companies have struggled to quantify—just how much a manager matters—they stumbled upon a surprisingly clear answer: a good manager's impact rivals that of an entire team of skilled employees combined.
The finding, published in The Quarterly Journal of Economics, upends conventional wisdom about what drives organizational success. For decades, business leaders have poured resources into hiring the brightest talent, yet the quality of the people managing those teams has remained frustratingly difficult to measure. In real organizations, managers are rarely assigned at random, making it nearly impossible to isolate whether strong performance comes from great leadership or simply from having talented people on the payroll.
Joseph Vecci, Associate Professor of Economics at the School of Business, Economics and Law at the University of Gothenburg, and his colleagues designed an elegant solution. They ran a controlled laboratory experiment where managers were randomly assigned to different teams while carefully controlling for employee skill levels. Teams tackled three different types of problems, allowing researchers to strip away the noise and see exactly what a manager contributed. The results were striking: "The manager's overall leadership ability is roughly as important for team performance as the total productive capacity of the employees," Vecci explains.
What makes a great manager, it turns out, has little to do with the qualities most people associate with leadership. The study demolishes the popular notion that charisma, self-confidence, or winning personality traits are what separate excellent managers from average ones. Instead, Vecci notes, "measures that are more closely associated with on-the-job tasks are much stronger indicators of manager success." In other words, the ability to monitor work, allocate tasks effectively, and motivate people through concrete action matters far more than force of personality.
The researchers validated this finding in the real world too. At a large retail chain, when manager quality improved from average to good, annual sales jumped by 25 percent—a dramatic vindication of their laboratory results. Over the course of a year, that difference compounds into something tangible: better-performing stores, higher employee engagement, and customers who feel the effects of tighter operations and more purposeful work.
Perhaps most provocative is what the study reveals about how managers are actually selected. The people most eager to take on management roles do not necessarily perform best once they get there—a pattern with particular implications for gender diversity. Women expressed significantly less interest in managerial positions than men, yet when randomly assigned to those roles, they performed just as well. This gap between ambition and ability suggests that many talented leaders are never given the chance to lead simply because they didn't campaign loudly for the job.
The researchers argue their findings make a case for rethinking how organizations promote people into leadership. Rather than rewarding those who most aggressively pursue advancement, companies could benefit from structured, competence-based selection processes that identify capability regardless of self-promotion or personality. It's a small change that could unlock untapped talent—particularly among women—and remind organizations of a fundamental truth: the person running the team might matter more than any single person on it.