Previous studies confirm the importance of the contextual factors of a territory on VPT, such as: income level, health expenditure, or relevance of individual determinants such as employment status, educational level, the condition of being an immigrant, age and race.
Estudios previos constatan la importancia que tienen factores contextuales de un territorio sobre la IVE, tales como: nivel de renta, gasto sanitario, o relevancia de determinantes individuales como status laboral, nivel educativo, condición de inmigrante, edad y raza.