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Comparative Study and Chronological Tags
Used with any article that is a comparison of two or more concepts. The term "comparative study" or the phrase "comparative effects" often appear in articles that require this check tag. All other check tags that apply to the article (MALE, FEMALE, ANIMAL, AGE, etc) should also be checked.
Used in conjunction with the publication types HISTORICAL ARTICLE, BIOGRAPHY or AUTOBIOGRAPHY.
If the material covers a time period such as 15th century through 20th century, check each time period tag covered.
Centuries begin on Jan 1 of the first year of the new century, for example Jan 1 2001 begins the 21st century.