Research (3) Least squares (3) Mínimos cuadrados (3) Investigación (3) régression (3) Exports (2) Sex (Biology) (2) Rate of return (2) Production (Economic theory) (2) Human capital (2) Human behavior (2) Shingles (Disease) (2) Fees, Administrative (2) Education (2) Tasas (2) Herpes zóster (2) Educación Primaria (2) Exportación (2) Educación (2) Recursos humanos (2) Producción (2) Conducta (2) Sexo (2) Rentabilidad (2) éducation (2) production (2) Gross domestic product (1) Environmental degradation (1) Labor (1) Futures (1)