Labor (2) Research (2) Education (2) Educación (2) Investigación (2) Trabajo (2) Chili (1) Ambulatory blood pressure monitoring (1) Trials (1) Teaching (1) Stocks (1) Race (1) Quality of products (1) Politicians (1) Physics (1) Physical education and training (1) Occupations (1) Nation-state (1) Mediation (1) Human beings (1) Learning, Psychology of (1) Intellectuals (1) Hygiene (1) Human behavior (1) History (1) Ethics (1) Education, Higher (1) Education--History (1) Dueling (1) Diffusion (1)