This assignment compiles research papers focusing on the impact of leadership styles and competencies on organizational effectiveness. Topics range from implementing Lean Six Sigma processes (Laureani & Antony), employee engagement through performance management (Mone & London), servant leadership mitigating agency problems (Politis & Politis), to the moderating effect of program context on leadership competences (Shao). Additionally, it examines social identity leadership in elite disability soccer (Slater & Barker) and the curvilinear relationship between charismatic personality and leader effectiveness (Vergauwe et al.). The assignment also includes a dissertation on safety education and culture (McGrath), an introduction to management topics (Mackenzie et al.), an overview of problem-based learning (Savery), and a meta-analysis on changes in job characteristics since 1975 (Wegman & Guenole).