How does the size of a team impact indi­vid­ual per­for­mance? The Ringel­mann effect sug­gests that indi­vid­ual pro­duc­tiv­i­ty decreas­es as the size of a group increas­es, lead­ing some to assume that larg­er teams result in lazier employ­ees. In sim­ple terms, peo­ple tend to put in less effort when they work togeth­er in a large group com­pared to when they work alone or in small­er groups. But what are the under­ly­ing caus­es, and how can orga­ni­za­tions address them?