Education (1) Assaying (1) Doppelgängers (1) State, The (1) Sports records (1) Seniority, Employee (1) Schools (1) Households (1) Hand (1) Gender (Musical instrument) (1) Dummy variables (1) Athletic ability (1) Academic achievement (1) Mathematics (1) Yields (1) Valuation (1) Age (1) Analysis (1) Teachings (1) Structure (1) Rating of (1) Students (1) Performance (1) Evaluation (1) Antigüedad en el empleo (1) Rendimiento académico (1) Evaluación (1) Manos (1) Centros docentes (1) Matemáticas (1)