Studies of the causes and consequences of turnover at the group, unit, or organizational level of analysis have proliferated in recent years. Indicative of its importance, turnover rate research spans numerous academic disciplines and their respective journals. This broad interest is fueled by the considerable implications of turnover rates predicting broader measures of organizational effectiveness (productivity, customer outcomes, firm performance) as well as by the related perspective that collective turnover is an important outcome in its own right. The goal of this review is to critically examine and extract meaningful insights from research on the causes and consequences of group, unit, and organizational turnover. The review is organized around five major "considerations," including (1) measurement and levels of analysis issues, (2) consequences, (3) curvilinear and interaction effects, (4) methodological and conceptual issues, and (5) We thank Jacob Holwerda and Shaun Werbelow for research assistance.Collective Turnover at the Group 2 Abstract Studies of the causes and consequences of turnover at the group, unit, or organizational level of analysis have proliferated in recent years. Indicative of its importance, turnover rate research spans numerous academic disciplines and their respective journals. This broad interest is fueled by the considerable implications of turnover rates predicting broader measures of organizational effectiveness (productivity, customer outcomes, firm performance) as well as by the related perspective that collective turnover is an important outcome in its own right. The goal of this review is to critically examine and extract meaningful insights from research on the causes and consequences of group, unit, and organizational turnover. The review is organized around five major "considerations," including (1) measurement and levels of analysis issues, (2) consequences, (3) curvilinear and interaction effects, (4) methodological and conceptual issues, and (5) antecedents. The review concludes with broad directions for future research.Keywords: turnover; retention; performance; organizational effectiveness Collective Turnover at the Group 3 Employee turnover is one of the most widely studied phenomena in the organizational sciences, historically receiving significant top journal attention, particularly with regard to predicting why individuals leave organizations. As part of the recent shift toward a more strategic approach to studying human resource (HR) management, however, researchers have become increasingly aware of the importance of understanding turnover at the group, unit, and organizational levels. Indeed, as of 2010, more than 100 articles have been published on turnover at these levels, over half of which appeared in the past decade alone. This literature, although largely consistent with the longstanding assumptions that turnover in the aggregate has meaningful implications for organizations, lacks a rigorous analysis of its major antecedents and consequences, a...