What does razón de masculinidad mean?
I'm looking at census records from Argentina and razón de masculinidad is one of the columns.
3 Answers
"Razón de masculinidad." In this case "razón" is an statistical term that expresses a special kind of ratio, related to males (masculinidad) within a population.
(1) Razón de masculinidad: cantidad de hombres por cada 100 mujeres.
It must be used to determine your chances for finding a date for the weekend.

It means, "the truth of masculinity" or "Masculine truth". It may refer to the tenses of objects in spanish, or it may have to do with gender roles.