Women (1) Wages (1) Social sciences (1) Research (1) Rate of return (1) Profit (1) Men (1) Education (1) Estudios (1) Hombres (1) Educación (1) Ciencias sociales (1) Beneficios (1) Investigación (1) Rentabilidad (1) Salarios (1) Mujeres (1) éducation (1) distribution (1) régression (1)