Electronic performance monitoring (EPM) refers to the use of technological means to observe, record, and analyze information that directly or indirectly relates to job performance. The last comprehensive review of the EPM literature was published in 2000. Since 2000, dramatic advances in information technologies have created an environment in which organizations are able to monitor employees to a greater extent and with greater intensity than was previously possible. Moreover, since that time, considerable research has been devoted to understanding the effects of EPM on individual performance and attitudes. Contradictory findings in the EPM literature exist, suggesting that EPM is a multi-dimensional phenomenon, and one for which contextual and psychological variables are pertinent. Thus, we propose a theory-based typology of EPM characteristics and use this typology as a framework to review the EPM literature and identify an agenda for future research and practice. Electronic performance monitoring (EPM) refers to the now-common use of technological means to observe, record, and analyze information that directly or indirectly relates to employee job performance (Bhave, 2014; Stanton, 2000). Advances in information technologies, the reduction of costs of those technologies, and a paradigm shift of work into cyberspace have created an environment in which organizations are able to monitor employees to a greater extent, and with greater intensity, than was previously possible (Holland, Cooper, & Hecker, 2015). Many forms of EPM (e.g., video monitoring, call monitoring, electronic medication administration records, GPS tracking, wearable electronic safety monitors, electronic time clock systems, email and internet usage monitoring) are already widely used, and technologies such as microchip wrist implants (e.g., Astor, 2017) and body heat sensor desk hardware (e.g., Morris, Griffin & Gower, 2017) may be the future of work monitoring. The world has changed dramatically in the twenty years since the last comprehensive review of EPM research was published (Stanton, 2000): for example, portable devices such as smartphones, capable of collecting large amounts of personal and behavioral data about employees, are ubiquitous today, but did not exist in 2000. This rapidly changing environment of information technologies, and the growing prevalence of EPM, make a theory-based and detailed understanding of the effects of EPM critical. Thus, the time is ripe to review and integrate the last two decades worth of EPM research, examine big questions in EPM that have developed over the last twenty years, and identify gaps in our knowledge, with the goal of advancing both theory and practice in this area. PREPRINT Corresponding author: Tara Behrend, Behrend@gwu.edu. 3 We begin our review by briefly discussing how EPM differs from traditional forms of performance monitoring and then discuss modern conceptualizations of EPM as multi-dimensional technologies. We next propose a theory-based typology of EPM characteristics and use the typology as a framework to review the EPM literature, with a particular focus on the past twenty years of research. Finally, based on our review, we identify avenues for future EPM research and implications for organizations. REVIEW METHOD To review the EPM literature, we conducted keyword searches on Google Scholar and cross-checked results with searches in PsycINFO and ABI-Inform. Key words included "electronic monitoring", "electronic performance monitoring", "EPM", "workplace surveillance", "workplace monitoring", and "computer monitoring". We also cross-checked results with references from key articles. We limited our search to peer-reviewed journal articles published in psychology, management, business, and human resource related fields. Although our review largely focuses on empirical research published in the twenty-first century, for the sake of inclusiveness, we did not limit our initial search by time. We next read through article abstracts to ensure content relevance, excluding articles that only focused on broad or traditional monitoring and articles that focused on non-employee EPM (e.g., marketing-focused