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Despite the general expectation that ethical leadership fosters employees' ethical behaviors, surprisingly little empirical effort has been made to verify this expected effect of ethical leadership. To address this research gap, we examine the role of ethical leadership in relation to a direct ethical outcome of employees: moral voice. Focusing on how and when ethical leadership motivates employees to speak up about ethical issues, we propose that moral efficacy serves as a psychological mechanism underlying the relationship, and that leaderfollower value congruence serves as a boundary condition for the effect of ethical leadership on moral efficacy. We tested the proposed relationships with matched reports from 154 Korean white-collar employees and their immediate supervisors, collected at two different points in time. The results revealed that ethical leadership was positively related to moral voice, and moral efficacy mediated the relationship. Importantly, as the relationship between ethical leadership and moral efficacy depended on leaderfollower value congruence, the mediated relationship was effective only under high leader-follower value congruence. Theoretical and practical implications are discussed.

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Summary This study examined relationships between mentoring functions offered and transformational leadership as a mentor outcome and affective well‐being and organizational commitment as mutual outcomes for both mentors and protégés. For this examination, we conducted a longitudinal field study by using 111 matched reports from both mentors and protégés collected at three different points in time over seven months in nine Korean companies that administered a standardized formal mentoring program. Study results showed that mentoring functions assessed at Time 2 were positively associated with mentors' and protégés' post‐mentoring outcomes at Time 3 after controlling for pre‐mentoring initial levels of those outcomes at Time 1. Study findings also revealed that relative effects of mentoring on the mentor and protégé outcomes differed by the types of mentoring functions. We discuss the theoretical, practical, and methodological implications from these results. Copyright © 2012 John Wiley & Sons, Ltd.

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