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AbstractThe relationship quality that develops between leaders and those designated as followers is of longstanding interest to researchers and practitioners. The purpose of the present paper is to review the more recent developments in the field of leader-member exchange (LMX) theory to identify specific issues related to leader-member agreement and follower consensus that have potentially important theoretical and practical implications. We introduce the concept of LMX excellence, which involves high-quality LMX, high leader-member agreement as well as high group consensus in LMX quality. We outline how leaders and followers' behaviour as well as context can enhance or hinder the development of LMX excellence and conclude with an overview of the practical and theoretical implications as well as future research needs.Relationship-based leadership 3The relationship quality that develops between leaders and those designated as followers continues to be a significant topic of interest for leadership researchers and practitioners.Although the leader is the typical focus in much of the leadership-related research (e.g., leader personality traits, behaviours, styles, decisions, and so on), there is longstanding attention to the interactions between leaders and followers in forming and maintaining leadership processes going back to the influential early work of Weber . Although leadership research has advanced beyond Weber, this attention continues to evolve in terms of promoting a more systematic approach to relational or relationship-based leadership (Uhl-Bien, 2006).The most prominent approach that focuses on leader-follower relationships is that of LeaderMember Exchange (LMX), originally introduced as the Vertical Dyad Linkage model (Danserau, Graen, & Haga, 1975).The explicit focus of LMX is on the quality of the dyadic exchange that develops between leaders and followers (Graen & Uhl-Bien, 1995). The LMX approach was one of the first systematic leadership theories to include the follower in leadership processes. Although one focus is on the reciprocal exchange between a leader and a follower, the theory also acknowledges that both parties contribute to the development and maintenance of the ongoing relationship quality. Meta-analytic research has shown that high quality relationships are associated with positive work-related outcomes, such as follower satisfaction, commitment, and performance (Gerstner & Day, 1997) as well as citizenship behaviour (Ilies,...