Age at marriage is a convenient starting point in study both the static and the dynamic aspects of a human population. The predominating age at which persons of each sex enter into marriage is a highly important factor in determining the potential natural increase of the population. The marital behavior pattern of a rural population group is distinctive in that the bulk of all marriages occur from two to three years earlier than is true for city populations. Subjectively, it may seem desirable to set up certain age relationships between husband and wife, but objectively it is difficult to defend any age relationship that does not appear as a predominating tendency in the actual behavior of the group. The cultural heritage of a group probably determines more than anything else what its marital standards regarding age willbe.